lol there are heaps of sticky threads mate
but personally i have a vr v6, what i done was
extractors, tuned length pacemaker pref
2.5 inch exhaust, remove rear resignator
and a cold air induction with a pod and a good tune from delco or greenfoam
i also put twin throttle bodys on it, quiet a bit of increase with that, but close to $800 just for that 1
Vs eco 3.8, extractors, 2.75" exhaust, roller rockers, cammed, bored out 20, t5 manual, rolling on king springs all way round with monroe gt shocks all way round, every door has a ding but looks can be very deceaving