Heh hot4s ;p Dont their stickers make your car go faster?
Well the reason st185's are doing quater miles in the 15 second bracket is because boost is limited to 6psi in 1st and 2nd...
And there isnt anything wrong with the gearing ;p My grp a gt4 was in doing mid/high 13's with very little work. 3 1/2" Downpipe + std exhaust, K&N Filter, No boost limits in 1st and 2nd... Boost was at about 10psi. Oh and the grp a's have a 3.9 final gear as opposed to a 4.1 in the std models.
If you want your gt4 to go faster then do the usual ;p 3" Zorst, 13-14psi boost w/ high flowed turbo, cold air setup and a front mount ic would helpa lot too... 13's would be easy as...