Thread: 2012 zl1 muffler delete HELP
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Old 03-20-2020, 03:40 PM   #9
12oclockshadow
 
Drives: 2012 ZL1 M6
Join Date: Feb 2019
Location: Conroe, Tx
Posts: 221
Agree with others on factory NPP exhaust. Sounds mean as hell with headers. I'm not changing it and spending money.
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