Thread: Roush exhaust
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Old 05-19-2013, 11:50 PM   #3
Sonic Mustang
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Join Date: Feb 2013
Vehicle: 2004 Mach 1
Location: USA
Posts: 545
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I've heard/read this dozens and dozens on times.

What in the heck makes people think exhaust systems break-in?

Last edited by Sonic Mustang; 05-20-2013 at 05:38 AM.
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