depends on what you have done to your car ??
jdm dc sports 4-1 w/ 2.5 inch collector, but, then you got the issue of will you have enough back pressure.
i say if you only got bolt-ons goes comptech.
Anthony
__________________
Drunmann Tuning's Scoob: 2.55 liter-6spd swapped Bugeye, fully built w/280 cams and a rotated Precision-6266
DD: 2010 MazdaSpeed3: Fully bolted and tuned
Drift Missile: S13 DOHC swap, welded diff = slidetastic
Bicycle: Kawi 636R.
