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I supported Toymods
Location: Epping, Sydney
Registered: May 2002
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Re: exhaust size for revvy 18rg
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Fri, 12 September 2003 15:05

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it's a 2 litre n/a, so I'd be getting a good set of extractors (most important!), 2.5" into your cat, then 2.25 the rest of the way.
if you dont have a cat, 2.25 all the way.
remember, as exhaust gas gets futher away from the engine it cools, thus reducing in volume, thus needing a smaller exhaust diameter (hence the 2.5 -> 2.25 idea)
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