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Old 05-25-2012, 09:57 PM   #17
IDEALG
Chevy's "Rumble" Best!
 
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Drives: 2015 ZL1 6 speed
Join Date: Feb 2011
Location: Ideal Garage aka (Grayskull) Fords, nj
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i don't see how they could of messed anything up if they didn't touch the headers. only other thing i could think of is if they messed with the driveshaft and now you have a vibration.
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