cat...gut it or keep it?
#4
RE: cat...gut it or keep it?
gutting the cat should cost you a few HP, as it messes with the exhaust gas velocity. read the Backpressure article i posted a long time ago, it explains it very well. if you must get rid of your cat, get a test pipe, but the gains over a good high-flow cat are very small. as for the header, they usually show about 3-5 hp at the wheels. nothing ground-breaking, but very worth it.
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scottishpol
Header, Intake, & Exhaust
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12-31-2004 03:02 PM