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Exhaust mod questions...

865 views 4 replies 4 participants last post by  stamonkey 
#1 ·
I have been thinking about swapping out my exhaust for a full 3" setup without cat and Borla Turbo muffler. No intermediate muffler. I've had good luck with the Borla stuff in the past. Will the removal of the cat cause any issues or a CEL with my '99 9-3? O2 sensor issues? Will the aformentioned exhaust setup be too much and bog down the car?
 
#2 ·
It might cause a CEL, it won't help power greatly, and it will be loud ;)
 
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