+1
My test pipes buzz the crap out of my Berk exhaust. I'm going to experiment with putting some dynamat on top of the Berk cans to try and change their resonance but I've not got around to that yet. If it fails I'm probably going to ng to have to pop on some resonated test pipes. (Ug! more weight)
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09 6spd Berk CBE, JWT cams, ZSpeed CSC, Stillen (25 row oil, brake cooling, sways, gen3 CAI), Passport (9500ci), Quaife LSD, Z1 400 hp kit, ss lines, pads, rotors, clutch etc, Phunk's pan and fuel starve fix
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