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steve00s · 09-30-2007, 05:41 PM

This is absolutely false. I took the secondary cats off over a year ago and have driven thousands of miles on and off the track. No CEL. This really isn't something to do to gain HP as you will never notice the difference but it will alter the tonal quality of the exhaust which can be just as rewarding as a few HP.

09-30-2007, 05:41 PM	#7
steve00s Registered User Join Date: Oct 2005 Location: Seattle Posts: 352	This is absolutely false. I took the secondary cats off over a year ago and have driven thousands of miles on and off the track. No CEL. This really isn't something to do to gain HP as you will never notice the difference but it will alter the tonal quality of the exhaust which can be just as rewarding as a few HP. __________________ 2000 Black Boxster S EVO Intake & GIAC Tuning Headers & Porsche Sport Exhaust System ROW M030 Suspension Front & Rear Strut Braces B&M Short Shift & EVO Billet Linkage