Wehrli Custom Fabrication 2011-2016 LML Duramax 3" Down Pipe - WCF100121

Replace the restrictive crushed factory down pipe with this full 3" down pipe. For use with factory turbo or factory style drop in turbo.

Replaces the following GM Part Numbers: 12643610, 12638304, 12643214

Note: 2015.5 and newer LML have a 3 bolt flange exhaust system, this down pipe will only work if you use a 2011-2014 style exhaust system with v-band connection. Or you can use our 3 Bolt Flange Stainless Down pipe PN: WCF100705