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Originally Posted by IROCZBeast
off road y-pipe the way to go?
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An offroad y-pipe will work fine(Pacesetter's y-pipe is offroad) until it's time to go through inspection, then you need 2 cats to pass the visual inspection.
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Of course, thats only if you are running on a stock tune. If you want to tweak your A/F for best #'s then !cat is the way to go (because you fry them if you don't take them off).
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Yes, but once you start leaning things out that much it will only be a matter of time before you will end up blowing up the motor. It all depends on what the car is being used for. If the car is strictly used for racing then no need for cats. If you need it as transportation to work then run the cats.