Thread: Exhaust upgrade
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Old 09-07-2017, 12:06 PM   #9
jb92563
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Join Date: Apr 2012
Location: Riverside, CA
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I did the Top Speed Muffler and 2nd CAT deletes on my "01 S' as well and you must do both or you will get that unbearable drone.

In a 986 with the 4 CATS, the 2nd cats near the muffler are NOT sensored.

The car will pass the CA Smog if you get the front CATs nice and hot before testing.

In Southern CA, Boxster's 2000 and newer now are smog tested only by plugging into the ODBII port to read the data. No more tail pipe detectors.

If you have no Engine light on, you will pass the SMOG.
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2012 Porsche Performance Driving School - SanDiego region
2001 Boxster S, Top Speed muffler, (Fred's) Mini Morimotto Projectors, Tarret UDP,
Short Shifter, Touch Screen Dual Din Radio, 03 4 Bow glass Top (DD & Auto-X since May 17,2012)
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