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when I had my GTO I had flowmaster 40's on there with lots of pop, switched to the straight through SLP LM1's and the pop went away. so you think that the mufflers are NOT the culprit for drone and pop?
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2015 Silverado Z71 6.2/2011 Camaro 2SSRS LS3/2014 Cadillac ATS 2.0T
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