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      09-25-2008, 06:43 PM   #1
emjei
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Drives: 08 BMW M3 Coupe
Join Date: Apr 2007
Location: Puerto Rico USA

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Borla 2nd cat delete..droning..help

Today I installed a full Borla System. Cat back and racing pipes which eliminates second Cats...It sounds great but at around 2k RPM it drones a bit......

I dont want to go just catback since then cats will be taking power from engine.

Should I put a resonator and which one ???
Appreciate 0