I just bought a 2004 WRX and I was wondering what kind of mods I can do to help the engine out a bit without spending too much money.Originally Posted by Integra96
Removing the 3 cats sounds like a cheap way of getting more power, but is this something that's relatively easy to do? Will the car still pass smog in California? Will this give the car extra horsepower? About how much extra? Would I need to put the cats back in if I were to sell the car? Are there any negative effects of this?
Also, what does engine management mean?
If anyone can point me in the right direction that would be great, thanks!