Replace the restrictive crushed factory down pipe on your 2011-2016 LML Duramax with this full 3" Stainless Steel down pipe. For use with factory turbo or factory style drop in turbo on trucks using a v-band connection style exhaust, NOT the 3 bolt flange style exhaust.
Replaces the following GM Part Numbers: 12643610, 12638304, 12643214
Note: For 3 bolt style down pipe use PN: WCF100705
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