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Observation of NPP Exhaust / Crimped Exhaust pipes
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12-13-2015, 04:13 PM
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JDP Sales
Drives: Chevys at the limit
Join Date: Nov 2010
Location: SLC, UT
Posts: 9,621
Most certainly not an oversight on GMs part. I'm confident there is good reason for it. Catback that adds 10 RWHP over npp is a stretch.
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Jared Royce
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