The LML Duramax Downpipe for the 2011–2016 GM/Chevy Silverado and Sierra opens up exhaust flow right where it's most restricted, at the turbo outlet. If your LML is running a delete tune or building for competition, this is the first pipe that needs to change.
The factory downpipe was designed around emissions packaging, not airflow, which...
Reviews
4.4
11 ratings
5
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1
truck runs great
C
Customer · 2 days ago
This downpipe was great. Fit perfectly. Nice heat wrap on it. Absolutley zero complaints with this ppe product. Super happy with it.
E
Erik · April 4, 2026
2016 lml 2500 had
Fit and finish were excellent. Probably should have included plugs for the sensor holes.