[sperry]

Originally Posted by sp00ln

I would never get an HKS exhaust... they supposidly make "fake" 3'' exhausts... plus their mufflers bottleneck:

http://www.roadraceengineering.com/e...ustsystems.htm

If I were going to get any exhaust, I'd get something from rnrracing (www.rnrracing.com). I have their cat-back for my DSM and it's strait as can be, full 3'', SS mandrel bent.

That's a good point, anything that's going to bolt up to stock pieces will have to match stock diameters. So there is potential for bottle necks as Ryan described. However, I don't know what the deal is the the WRX specific parts. I've got a complete turbo-back exhaust, and it won't mate to any stock parts... it's all or nothing.

Also, HKS is a bit notorious for lower quality and higher prices on their Subaru parts.... while the opposite is true for their RX-7 parts... go figure.