Quote:
Originally Posted by david.avrahami@
1987 Porsche 911 - installed M&K Pre muffler with SW CHIP. excellent performance results, however, disappointing smell….
My original cat has 70,000 miles on it and I am considering going back to a cat. but would like to have less restrictive one as far as loss of HP and of course NO SMELL…any recommandations and experiences are most appreciated.
ALSO…if i redirect the muffler tip on my present set up ( M&K PRE MUFFLER & STOCK MUFFLER) pointing down or to the back will make a difference in smell coming in when idle at stop lights?
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Not sure why you're having this problem. Over the past 20+ years I've run modified software (AutoThority when they were in business, Wong, custom burned) with cat delete pipes and both stock 1-in, 1-out and gutted stock mufflers and have never had a bad smell. I assume you reinstalled your O2 sensor? Any chance you might have damaged it during removal and reinstallation?