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Old 03-28-2008, 11:01 AM   #8
steve00s
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Join Date: Oct 2005
Location: Seattle
Posts: 352
When I first put headers on my car I also had the secondary bypasses so no cats. The throttle response was noticeably improved but the sound was horrible. I have the PSE on my car and it had always produced a great growl at RPM's. Without the cats, the sound was higher pitched and raspy. I slunk down in my seat it sounded so bad though others really liked it. I tripped a cel about every 300-500 miles. I put the secondary cats back on. I little less HP but much better sound.
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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
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