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Location:
Wollongong
Registered:
May 2002
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Location:
_Sydney _
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Sat, 12 October 2002 08:37
 
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Yeah Ive read a bit abt the twin pipes myself and will be doing it shortly. Ive been shoping for exhaust and 3 places said theyd do it, hi tech, liverpool exhaust and long last. Including the rest of the exhaust system. But since things are a bit pricey Im gona get the twin pipes made up elsewere, probably the same place you know soarer and get some one to install them and do the rest of the exhaust at the same time. I think this is gonna work out a fair bit cheaper. Im not to keen on doing it myself fairly cramped and id say a hoist would come in handy at some stage. Also I think what you would have to consider if you got some one else to make them up that it will line up to your exisiting exhaust, coz if its off a little bit ur gonna be in trouble. Just a thought, you can find some info on celicamads website...
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Location:
newcastle
Registered:
June 2002
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Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Sat, 12 October 2002 22:50
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Don't bother asking someone to post chassis dyno graphs before and after the twin pipe exhaust mod. I tried but no one would.
I believe that the twin pipe exhaust mod allows turbos to run cooler,hence they last longer under higher boost applications.My own b4/after dynos showed no power gain,but others have reported good gains on power meters etc.
Given that the stock CT12A turbos have a ceiling of about 360hp(IMHO),i feel it is probably better to save your dosh towards a more capable turbo set up.
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Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Sat, 12 October 2002 23:49
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Nice site, Celicamad!
Very similar to what I'll be putting on my own site after the 1UZ conversion is finished...
Speaking of which, a quick progress report is in order...
1UZ is fully installed (mechanically speaking, including full 2.5" mandrel-bent exhaust)
transmission is also installed, using the Cressida 'box, coupled with the Soarer Torque converter. Tailshaft needed to be lengthened by 30mm, which has been done and is now back in the car.
Wiring is about 75% complete. (Will need help for the last 25%- hopefully this week)
Have sourced a twin-thermo fan setup from an EF Falcon...fits quite nicely to the stock radiator. Need to makeup some brackets in order to utilise the original bolt-holes. Then, re-install radiator, flush cooling system and fill.
Also, we are still (after three weeks!  ) waiting for the last fitting to enable us to fit the remote oil filter.
Once all that is done, we need to get it engineered, inspected by the ever-vigilant RTA people, source decent suspension, some decent rims (possibly have located some "AMG-style" rims that should suffice), fit a CD-stacker and security system (for the lowlifes I mentioned in a previous thread - see "This Sh#t sucks" in "General").
After all that, it should be done...ready for a shakedown run at Wakefield Park.
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Location:
newcastle
Registered:
June 2002
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Re: 1JZ-GTE Twin Pipe mods
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Sun, 13 October 2002 00:05
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BLAKE NZ
No others just built them properly .Twin pipes are a waste of time unless the rest of exhaust system is free flowing enough .
You built your own and did not consult anyone on the design .I have offered the idea free!! and all of the 5 people i know that have fitted them have had the exact same result ........EXCEPT YOU
If you did a simple exhaust back pressure test you would be able to identify your problem .
If you post a picture of your twin pipe design i will tell you what you did wrong
The one thing i cant understand is how you claim 0-100 times of 4.8 secs with twin pipes fitted .THEN say they dont work !!!
quote "I put on sticky tyres and blasted 4.8secs and 12.9 for the 1/4 mile on a G-Tech(previous best 5.2,13.2secs with same sticky tyres)"
i have yet to see a any 1j powered car crack 5 sec 0-100 without twin pipes
you have already previously admitted that the steel wheels fiitted to your turbos made NO MORE POWER
QUOTE "ask the turbo shop to install CT12 steel wheels(found on 2 litre twin turbo supras,GA70,1GGTE).These have the same base diameter as CT12A ceramic turbines, and share the same shaft diameter.Even though they weigh 166grams,twice as much as the ceramic wheel and shaft,they hit positive boost at exactly the same revs.Unfortunately,there is no power difference,according to my before and after dyno."
SEEMS to me then the twin pipes are working perfectly
Forget the dynos the performance results speak for themselves.It is impossible to compare two different dyno's
Just because you couldnt copy the design yourself.doesnt mean they dont work it means your setup is wrong .
But if your performance claims are true (which they probably are) then your 0-100 and 1/4 mile times are EXACTLY THE SAME as other twin pipe 1j's .
THANKYOU FOR PROVING TO EVERYONE ON HERE THAT THE TWIN PIPES WORK EXACTLY HOW I CLAIM THEM TO !!!
biased99
1uz should be a lot of fun .One of those with a CAPA blower kit would make a torque monster i hope you fit twin exhausts ..nothing like that sweet V8 sound
[Updated on: Sun, 13 October 2002 00:51]
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Location:
Wollongong
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Sun, 13 October 2002 01:30
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Not taking any sides here, but I think that might have been a little harsh celicamad.
Anyway, should I just try a normal exhaust shop to make up the twin pipes, or can one of the Newcastle places make them up and send them down my way ?
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Location:
Southern Sydney
Registered:
August 2002
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Re: 1JZ-GTE Twin Pipe mods
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Sun, 13 October 2002 08:59
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When you find the shop to do the twin pipe fab Ask if they'll give a discount if you have mulitple orders.
I know I'll be in for a set and I'm sure there would be a few others too. Ask mx83toy, he will probably want a set.
I'm going to get the rest of my exhaust done at the same time, so I'll just get who ever does that to fit the twin pipes aswell.
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Location:
Wollongong
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Sun, 13 October 2002 09:20
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I'll go quiz the local exhaust shop. My Soarer was their first, so lets see if they want to take on this challenge as well.
How many people are interested in a set ?
Myself, Remedy, Bounty, mx83toy...
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Location:
Southern Sydney
Registered:
August 2002
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Re: 1JZ-GTE Twin Pipe mods
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Sun, 13 October 2002 09:42
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On the subject of exhausts, What do you guys think of this setup.
3 inch from the turbos into a highflow cat.
Split into dual 3 inch system with a resonator on each side.
I'm not entirely sure what mufflers I want, I've heard good things of Lukeys (not sure I spelt that right)
I want to keep the dual system, I know some will disagree with this move but I like it.
My main criteria are:
1. As big a Performance gain as possible, while
2. no droning noise at cruising speeds or idle, I don't mind a bit of noise under hard acceleration 
Would this system work well with the twin pipes? Can anyone suggest improvements?
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Location:
_Sydney _
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Sun, 13 October 2002 10:02
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Im in the same situation remedy, but im gona go 3inch from turbos hi flow cat then into two 2 1/2 inch big stainless mufflers and 2 resinators
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Location:
Wollongong
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 04:07
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Drone is created by bends and other interferences, My car is fairly drone free,. you want no drone, put in straight pipe.
at highway speed (cruise) wind noise is greater than any other noise in my car.
there is not the huge soul shaking boom at 2000 rpm it used to have. my system is as follows.
2.75 inch twin pipes from the turbos, into twin super excelent high flow 2.5 inch cats, twin straight through 2.5 in mufflers, joining behind the diff in to a single 3.5 inch cannon aka cheapo truck resonator.
This system is quiet and made a 30 rwhp gain over the previous system which was, stock dump pipes into 3 inch cat, into twin mufflers (same) join into 3.5 inch STRAIGHT PIPE.
There is no doubt that the twin pipes made a measurable difffernce to the performance of my car, though it made verry little difference to the way the car felt to drive, however once out on the g-tech or dyno plus my times dropped by at least 3 to 4 tenths of a second 0 -100.
Anyone who has tried to reduce thier 0-100's by this much by other means will know just how difficult that is!!!
Call Peter at Newcastle Exhausts. sorry , will have to look up the number.
Tell him Matt with the black supra sent you.
He will sort you out, and may do a bulk job, last I know he was thinking of setting up a jig.
You can ask him , but i am confident he will not do the spannerwork, unless you are prepared to pay BIGTIME.
I even have a spare set of flange plates left at his shop you could use to get your own laser cut.
Matt
ps. properly constructed twin pipes will nearly double the loudness of any exhaust system, so if you are borderline already, it will be obscenely loud afterwards.
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Location:
Canberra
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 06:54
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Ok, Expressing my interest in getting a twin pipes part made up as well! Please add me to the list! Would be good to do the conversion with them in first up! 
Thanks
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Location:
Sydney Australia
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 07:19
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add me to the list too please When we all go together it will be a good cruise if nothing else  hehe
Luke
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Location:
Sydney
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 07:49
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Just my 2 cents worth having had the twin pipes on for 3-4 months:-
I got the twin dump pipes from Brendan in Maitland as recommended by the Newcastle boys in the past on this forum. He has the jig setup after making the early ones from scratch apparently. They go for $400+ from memory (GST, transport etc).
You may need to custom modify the flanges to clear a Soarer bellhousing as I did for the R154 and make up your mind what you're doing with the O2 sensor as it needs to be relocated or removed.
Exhaust went from a single 3 inch to 2 X 2.5 inch with high flow cat, resonators and mufflers to twin 2.5 inch all the way from the dump pipes back with twin 2.5 inch hi flow cats, resonators and mufflers. The noise level went up substantially, so a crossover pipe was later fitted which reduced it somewhat.
Power-wise, I saw no substantial increase in power, 0-100 times or 400m times - 189rwkw before and 191rwkw after; not worth comparing as different temps and fuel will swing the figures either way.
Under bonnet temps increased a little and I had to heat shield the trans tunnell from the outside to cool the floor/tunnel on the inside.
I was expecting 10-15rwkw as had been suggested on the forum so I was obviously disappointed in the results. In hindsight, I would have rather spent the money elsewhere or saved up for some other power or safety upgrade.
Perhaps my exhaust is too free-flowing now and not creating enough back pressure?
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Location:
Southern Sydney
Registered:
August 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 08:44
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| Quote: |
Perhaps my exhaust is too free-flowing now and not creating enough back pressure?
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I was led to believe that no back pressure at all is ideal. Especially on Turbo charged cars.
Pull your exhaust off just before your cat, adjust air/fuel ratios too suit and then try and tell me what effect no back pressure has? 
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Location:
Sydney
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 08:54
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After fitting the twin dump pipes at home, I actually drove about 6-8 kilometres from home to the exhaust place with nothing but twin 2.5 inch pipes coming out under the driver door - no back pressure at all. It would not rev past 3500 rpm/come on boost at about half throttle; mind you I did not try too hard (fast, full throttle) as it was 7.30 in the morning just at the start of peak hour and it was loud as hell !
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Location:
newcastle
Registered:
June 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 08:55
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Manny
Firstly how much boost are you running and secondly .what 0-100 times have you done .Power seems a little low .should be more like 205 rwkw
One point that i might add is that power gains are based on around 15 psi as are my 0-100 times
you cant have too much flow
when you say mufflers how many ??
with the twin 2.5 inch pipes you have two mufflers and two resonators.twin 2.5 inch mufflers flow only a little more than one 3 .but you have effectivley four Mufflers(be they reso or muffler) .
The problem may well be a Balance problem
The two pipes should JOIN at any point for at least 500 mm to even pulses .I assume you have FULL MANDREL BENDS ????
The first few bends Brendon put in my twin 2.5 inch where press bent .But as the rest of the system was Mandrel Bent .So Very little resrtiction was noticed .the 1js whith full MANDREL make about 5 more H.P
I have twin 2.5 twin cats joining half way down car into single 3 inch
After having brendon do the exhaust i took it To LILLFORD in Thornton and they changed the resonator for an oval straight through muffler and a big roung Straight through rear....VERY QUIET Just as powerfull
how many k's on the Soarer
Check all hose connections for intercooler(nice and tight) .The same thing happenned once before on a soarer.Interestingly enough peak boost still measured the same but more lag was noticed
If you cant work it out bring it up to Newcastle and let Peter(Newcastle Exhausts) have a look at it or even better LILLFORD ....expensive but the best !!!
Peter did a very nice job on matts Supra .And the 0-100 times compared where with two people in the car on the second run.
So i believe this will go even harder .especially when high flow cats are fitted
I think ANY good exhaust shop can fit twin pipes as long as they use 2.5 inch pipe.
It would be hard to get a Bulk deal as the pipes are vehicle specific and need different bends for Cressida,soarer and Supra
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Location:
Sydney
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 09:27
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Celicamad
I've been running 0.98 bar measured at the compressor housing.
My 0-100 times vary depending on road surface/ grip/ temp/ revs/ clutch use but best had been high 6s with no LSD behind the R154 before and after twin pipe.
Mufflers are twin straight through double offset Stainless Lukeys and a pair of straight through hotdog type resonators - qty and type of mufflers has not changed from before and after twin pipes. Only added an extra Cat ; cross section between 3inch and twin 2.5 inch is up over 50%, so I assume this helps with flow.
I suspect that balance may be an issue - contemplating an x-pipe/siamese pipe before giving up. Mostly mandrel but as it has been experimental and modded regularly, saved on having some exhaust sections mandrel until I'm happy with a final exhaust design before going full mandrell.
Brendan's pipes in mine are mandrel, save for the slight indentation between the two turbos to allow fitting.
Car's got 79Ks on it, assuming it's the same motor that left the factory, so does it.
Hoses are fine, I went FMIC a few weeks ago so all IC pipework been replaced now with mandrel stainless, silicon rubber and HQ SS clamps.
Gonna fiddle a little more with exhaust, temporarily bypassing the cats with a single pipe / x-pipe etc, before I give up and move on to other areas.
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Location:
_Sydney _
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 09:28
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So in theory what would work out better? running twin 2.5 inch all the way 2 cats and all. OR 2.5 off the turbos going into a single 3 inch one high flow cat, then back into twin 2.5 inch 2 resonators 2 mufflers? OR keep the single 3 inch all the way one resonator one muffler? im considering the second option since i want to keep the look of my car with twin exhasut outlets at the rear, and some how keeping it as quiet as possible.
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Location:
newcastle
Registered:
June 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 10:04
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The Balance issue is a big one, but an x pipe would be awesome.
In theory twin 2.5 inch mandrel bent with a good balance section
and a Pair of high flow mufflers should flow better .
ANY exhaust can only flow as good as its worst restriction
Could simply be a boost gauge issue(AGAIN!!) try 1.1 bar(16psi) thats what Matt runs .But we havnt tried swapping gauges.its been suggested that my gauge reads about 1 psi less
do an exhaust back presssure test .have two coiled copper lines welded onto the pipes after the last mufflers join them with some boost line and measure total back pressure(with a boost gauge) under load eg road or dyno mine is 2.5 psi any higher and you need some work
Either way its WAY too slow .MAYBE A TRACTION ISSUE .
talk to MATT (TOYO3t).he was originally dissapointed with twin pipes until he could get the new FAT torque to the ground .then ...HELLO!!!! YOKAHAMA
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Location:
newcastle
Registered:
June 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 10:31
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WHOOPS just read your post again 0.98bar at compressor housing.
This would be considerably higher than manifold pressure boost you will incur boost drop at intercooler and every 90 degree bend is 0.25 psi .
you should run 1.0-1.1 bar at manifold
with twin pipes i have run 1.3 bar no probs
Measure manifold boost pressure this is what the engine gets .And is what all power figures are based on. at 12 psi little to no power gain was measured
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I supported Toymods
Location:
Perth WA
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 11:10
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Would you save more weight than the performance gain trying to go to a single tailpipe? I know the Soarer has two bumper cutouts, but the extra muffler and the pipe must weigh about 10 extra Kg, for little extra flow (maybe a little bit more ).
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Location:
newcastle
Registered:
June 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 11:28
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WHAT difference would 10 KG make??? if the exhaust made 1 H.p more your in front .
In fact the Cressida does its best times on a 3/4 full tank than 40 litres(40 kilos approx) less .WHY more traction!! direct weight over the wheels .
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Location:
Sydney
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 11:33
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I don't think Soarer owners are worried too much about 10kg or 0-100 times in a 1800kg Grand Tourer. I prefer to know I can accelerate quickly and safely from 60-250 and back again.
I'd have bought a MKIV Supra if I wanted an outright sports car but the luxury, value and performance steered me towards the Soarer.
Besides, the twin exhaust tips look the part
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Location:
newcastle
Registered:
June 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 11:46
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Manny
i know of an auto Soarer running twin pipes ,single three at rear (i dont think this is really an issue) .
That has run low 5 sec 0-100 times .I believe the only reason why he hasnt run lower is the restrictive soarer Intercooler .i thought a manual Soarer weighed about 1650?? if so Matts JZA70 Supra(manual) weighs 1580 and has run low 5 sec 0-100
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Location:
Sydney
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 12:19
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Celicamad
The single rear was not a concern for me - just reverting on jza's comments.
A well sorted auto with a tricked up torque converted and solenoids should outrun a manual to 100
I was being generous with 1800kg - mine weighed 1740kg at a public weighbridge for a blue slip earlier this year with half a tank of fuel and no driver - given that I'm a big unit just on the right side of 100kg, it's hauling 1850kg most of the time with a full tank
I'm sure I can get high 5s or better with a LSD and an aggressive launch, but I don't like spitting out $1500 clutches very regularly or crunching the changes from 1st to 2nd.
BTW, I don't concern myself too much with 0-100 times if you haven't gathered that yet and as such don't time and compare due to the inaccurate nature of it in my eyes.
Gearing may have something to do with it too - I hit 100 with only two gears whereas I understand the manual Supras are well into 3rd on a nice fat torque curve.
A recent day out at Wakefield (my first ever on a racetrack) cemented my satisfaction with my Soarer - 1m18s with street rubber - cornered well, braked better than most and nice fat torque curve pulled like a train out of corners ; the best car of the day was a worked R34GTR vspec doing 1m16s before he lunched his box after noon - I believe I know who had the better bang for buck
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Location:
newcastle
Registered:
June 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 12:48
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No I realise Your view on the pipes .Wasnt aware of any gearing differences .
However Either way i was simply comparing so that you are aware of what IS possible.
Set the boost up as i suggested im sure youll be very happy
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Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Mon, 14 October 2002 17:12
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I've seen a few before and afters on the dyno with these pipes made.
And before you ask, it's not my car, and I'm not posting the dyno sheets for someone elses car.
Torque is possibly of more significance when you look at this mod, as well as the area under the curve on the graph.
The torque curve also (whilst greater overall) flattens out after this mod, maybe why people feel it less, no big surge.
And considering how fat the arsed heavy all these 1j cars are you probably need as much torque you can get
Paul is right, they definitely work, more boost will obviously show a greater gain, not just in this case, but in any car with a restriction removed from directly after the turbo.
Can't agree with you on Lilfords but. Not at all. I don't mind spending for good work, but that's not what he's selling.
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Location:
newcastle
Registered:
June 2002
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Re: 1JZ-GTE Twin Pipe mods
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Tue, 15 October 2002 10:12
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Congratulations .thats the best technical description of the result from the twin pipes i have ever heard.
You couldnt be more right TORQUE is the big factor but MOST people only seem to look at peak H.P
did you also find as i did that actual boost came on about 300-500 rpm sooner ?
When we look at Andy's torque and power curve (no twin pipes).The result was awesome .
comparing the two cars he actually had a higher peak power
(more boost, big FMIC and a fuel controller).same weight same gears etc
But in a straight line race I pounded him off the mark and up to about 160 KPH where he was gaining on me he would have eventually caught me but i backed off
The point is although he was making almost 15 RWHP more it was all in top end. at 4000 RPM i was making 50 RWHP more than him
Of course as soon as he fits twin pipes he'll smash me but they are a hell of a lot cheaper than the intercooler and fuel controller .
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Re: 1JZ-GTE Twin Pipe mods
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Tue, 15 October 2002 11:10
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I agree the car felt "flatter" after the twin pipe mods, and I was even convinced that they had failed or I had stuffed up after driving the car with the new pipes.
I called numerous known header makers trying to get some concensus on whether i neeeded a cross pipe or not.
I was fretting cos I thought they did not work!
UNTILL I VISITED PAUL TO USE THE DYNO PLUS.... the times speak for themselves and the HP increase is there.
Torque delivery is much earlier and more linear, no boosty turbo feel that we all associate with turbocharged grunt. The car even stopped losing traction in on boost rollons.
and for the recordI am not running quite that much boost.
The controller is set at 1 bar at the compressor housing, not the manifold, however I usually manually set the trim agressively to get a little overboost to no more than 1.1 bar.
though since I tried the overboost trick I haven't been able to get enough traction to improve on my times!!!
with a stock cooler and plumbing (leaky fromt he factory) I am probably gettting no more than 13.5 psi @ engine.
Matt
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Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Wed, 16 October 2002 05:30
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Brendon at Premier Exhausts in Newcastle already has a jig made up, and already sends them all over the place (internationally - with repeat orders) and has gone and got dyno sheets (and they're chassis dyno graphs Blake)done already.
Remember, this is no fanciful thing. It's not a suggestion of 20rwkw by painting something pink and slapping a sticker on it.
It's really only a larger dump pipe on a turbo car.
If a restriction is removed from directly behind a turbo, on any car, initial spool must occur earlier because less effort is required, and an earlier spooled turbo produces what?
If you raise the boost slightly to compound this, you'll make more boost than the previous peak, but at a lower RPM.
I don't even see how you can get consistent results across all these cars? Aren't the intercoolers different in a jzx81, jzz30 and jza70? Spool differences with different volume intercoolers (forget efficiency for a minute and just think pipe, core and tank volume) are quite significant.
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Location:
Canberra
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Thu, 17 October 2002 00:49
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celicamad, is this jig what you've used?
If not is it the same specs, 2 inch etc?
Can someone help?
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Location:
newcastle
Registered:
June 2002
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Re: 1JZ-GTE Twin Pipe mods
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Tue, 29 October 2002 11:13
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The chaser intercooler and JZA70 supra are the same .this is what MOST of the testing has been done on .
Brendon made my twin pipes and did a very nice job .
The reason Brendon has sold so many sets is i had his number on my webpage and sent about 20 people to him (dont know how many bought)
Peter at Newcastle exhausts also has made them
And the original set was made by pro-tech(i think thats the name).from the central coast
I cant agree more its not rocket science in fact the only reson the twin pipes work so good is the factory y piece is SOOO bad
Finally in regard to LILLFORD he has since modified the original exhaust .And although peak power was about the same at 4500 rpm power was up almost 15 h.p at wheels.....cant beat mandrel bends!!!!!!!!!!
The car is now faster AND quieter
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Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Tue, 29 October 2002 22:22
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What rear can have you got CM?
I think you had the same rear as on my mr2? Is that still the same?
Mines very quite. cept since I got my new intercooler, the tubo whine is loud as buggery.
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I supported Toymods
Location:
yandina sunshine coast
Registered:
September 2002
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Re: 1JZ-GTE Twin Pipe mods
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Wed, 30 October 2002 05:37
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i have ditched the twin pipes for a single 4 inch , hi flow cat and a big "ricer" exhaust and have found the car to be much more responsive and toee
if i fit the removable baffle back in the 44 gal drum muffler i loose most of the response i gained over the twin system
i will add the single traight though is damn noisy 
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Location:
newcastle
Registered:
June 2002
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Re: 1JZ-GTE Twin Pipe mods
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Wed, 30 October 2002 11:16
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JASE
The rear can brendon fitted had a restrictive plate in it .The new rear muffler made a big difference.I them fitted a second oval muffler .The rear muffler lillford fitted flowed better was quieter and cheaper .EVEN with TWO mufflers the whole thing flows great now
tt soarer
i assume you mean you ditched the factory twin exhausts
not that you ditched twin dump pipes from the turbo's
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Location:
newcastle
Registered:
June 2002
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Re: 1JZ-GTE Twin Pipe mods
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Wed, 30 October 2002 11:20
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these are Brendodns twin pipes
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Location:
Sydney
Registered:
May 2002
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Re: 1JZ-GTE Twin Pipe mods
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Fri, 01 November 2002 12:27
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Bump !!! so i can find this when i get home........
just reading this all again some cool info here
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