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12770, 2001, 2500hd, 60, 81, cummins, gmc, installed, magnaflow, muffler, mufflers, problems, quiet, resonance, sound

Magnaflow muffler installed on 2500HD 6.0

JasonsSS on Apr 23, 2002

Apr 24, 2002 10:13 PM
by CMNTMXR57

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GM Engine & Exhaust Performance

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