The muffler could have a blockage, is there any rattling coming from the muffler? Could also be a clogged cat converter.
The muffler could have a blockage, is there any rattling coming from the muffler? Could also be a clogged cat converter.
'04 CC 2500 6.0 4L80E, K&N CAI, Magnaflow dual exhaust exit b4 rear wheel, 93 black bear tune
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