I've done a bit of research on the topic for my MY02 2.5 and I've come up with a few different options. MRT full header back. Good power gain but mild steel. You will eventually have corrosion problems. Another option is TWE headers and a muffler shop special midpipe and catback. Magnaflow is sold nearly everywhere and offers very decent catbacks for the money. A shop can fab a midpipe for you, though they may hassle you about the whole cat issue. If so Stromung manufactures a cat-less midpipe for "track use only" Borla headers are always an option and an affordable one at that. You won't see the kind of gains that you might see out of the other systems but you will pay less and they will sound great. Thats just what I've come up with so far, hope that the information helps a bit. Here are some links that you may find helpful. www.borla.com www.mrtrally.com www.techworkseng.com www.stromung.com www.magnaflow.com Again, hope that this is helpful.

TVA

 

SYMS is the best. Good luck finding and affording it though. Other than that you have MRT, Brullen, TWE, and a Borla/high-flow cat/cat-back set-up.

JC