9-5 2.3lpt 2.5" I.D. downpipe w/ no cat.. installed!!!! - Saab Performance Bulletin Board - Saabnet.com
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9-5 2.3lpt 2.5" I.D. downpipe w/ no cat.. installed!!!!
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Posted by Luke [Email] (more from Luke) on Fri, 26 May 2006 17:04:00 Share Post by Email
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So I fabbed it at work took about 5 hours total, to make it and fit it. Total cost? 120 bucks and a little sweat.. So, the out come of not running a Cat with the rear O2 sensor? Am I pulling a code? The answers to both, it runs Fabulously with no codes as of two days of driving. What is the trick? I followed some advice from a tip on here I ran the 2nd O2 sensor into a slightly bored out spark plug non-fowler (sp?) and it runs like a champ! But has my gas mpg gone down not having a true exact reading of the 2nd O2? As of now I haven't noticed a loss in mpg. (minus me stomping the accelerator) and as for sound and performance not running a cat with a 2.5" downpipe? Just as smooth and quite as before except an added exhaust wush during spoolup (VERY nice sounding but no extra db.) and the performance more solid boost alot sooner and a noticed gain in torque n pull sooner and longer! As for my opinion, 120 bucks for a beautiful sound and power gain with a concervative sleeper downpipe look? Simply wonderful!!!!

posted by 65.27.215...

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