the inlet is 3" so youll have a full 3" exhaust that flows well
i made it 3.5" but when it reaches the barrel it becomes smaller 3" cos i couldnt find an exhaust barrel with a 3.5" inlet
sub- u should see the WRC cars, they use paddle shift gears behind the steering wheel. and only have brake and accellerator pedals.
i have a video of subaru WRC sti chasing normal Sti. and its awesome.
http://www.skylinesaustralia.com/photopost...&cat=all&page=3
waw my bonnet looks like gold carbon kevlar here. do u have a bigger foto of that one joe?