Quote:
Originally Posted by joseph.m240i
Added J pipe to my m240i when doing muffler delete. After all the math I decided to add 31inch j pipe. It only reduced drone for certain RPM. Not worth it. I will highly recommend get a aftermarket catback system.
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Yes, the J-pipes targets very specific RPMs. What RPMs did your 31-inch J-pipes address?
Did you add or look into bullet resonators as well? Thoughts on these?
TIA
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