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you see Arthur...
Join Date: Jul 2005
Location: West Vancouver BC & San Juan Capistrano CA
Posts: 672
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I run a cat bypass. Nothing noticeable in hp gains, but it sounds better. Anytime you free up the exhaust flow its a good thing. BTW I use a Bursch with o2 bung, which gets plugged in for smog testing only.
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J
82 911 SC, Cat bypass, Flowmaster 1 in 2 out lightweight flywheel and backdated heat
06 Cayenne S
00 ML 55 AMG
Santa Cruz Bullit
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