Thread: F.I. Catback exhaust Cold & Hot Start procedures?
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Old 09-08-2010, 03:35 PM   #4 (permalink)
m4a1mustang
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Originally Posted by NISSNISS370Z View Post
Interesting, and why is this?
It's to put the exhaust through a few heat cycles for a proper break in instead of taking it out for one extended drive since the metals will expand with heat and contract as they cool.
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