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Originally Posted by edevlin
I have a TTP intake, headers and 100-cell cats going to a stock muffler on my 2.7L Boxster. I tried a Gemballa muffler with that rig, but it was way too loud for my tastes. My current exhaust setup sounds fine, but I am wondering if the stock muffler is acting as a bottle neck for the exhaust gas in my system.
Ed
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Hi, Ed. I am planning to do exactly the same as what you have done. Intake, header and 100cell Cat to the stock muffler.
Here is the question. Did you get a CEL? If you did, what is the proper fix for it?
I have some idea for that. See what you think.
I am thinking to extend O2 sensor wiring to reach front side of CAT and rear of CAT. I might have to install O2 sensor eliminator (that is what they call it, about 10 bucks) to have system thnk it still have good CAT. Let me know what you think. Thanks.
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2001 Boxster S triple black
16000 mi