high flow cat?
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You won't feel anything. there would be more of a difference if you had FI and went from stock to highflow. They will quite down your exhaust alot if you don't have a cat but louder if you have a stock cat. not much of a difference from stock to high flow, At least I didnt' notice barely any.
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From: San Diego, California, USA, Northern Hemisphere, Earth, Sol System, Spiral arm of the Milkey Way
Rep Power: 0 even with an aftermarket cat back, the catalytic conveter is still the least restrictive part of the exhaust system.
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From: Nunya, U.S. Virgin Islands, US
Rep Power: 0 With just a high flow cat, the gains will be minimal because you still have the restriction at the factory exhaust manifold. There's only a minimal amount of power to be gained from the D17 engine, but replace both the header and cat, then you'll feel a difference.
As for the sound.....a high flow cat may make things a bit louder at certain RPMs. The resonator is what quiets things down. Take that off and it will be much louder.
As for the sound.....a high flow cat may make things a bit louder at certain RPMs. The resonator is what quiets things down. Take that off and it will be much louder.
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