Duramax Upgraded Oil Cooler 2001-2007 and 2011-2019

Upgrade your Duramax diesel with our High-Flow Engine Oil Cooler Kit – engineered to reduce oil temperatures by 10–25°F under both unloaded and towing conditions. Whether you're daily driving, towing, or running higher horsepower, this kit is designed to maximize oil cooling efficiency and long-term engine health.

Performance Benefits:
- 10–15°F reduction in oil temps daily driving
- 25°F peak oil temp reduction while towing
- 22% greater heat rejection at factory HP levels vs older L5P cooler
- 31% better cooling at 600HP / 3300 RPM
- 35–89% more surface area than factory units
- Bolt-on upgrade for most Duramax engines

What’s Included:
- OEM GM 2020+ L5P Max-Flow Oil Cooler
- GM Oil Cooler Adapter & Hardware
- GM Cooler Gasket & Adapter Gaskets
- GM Oil Filter (ACDelco PF63)
- GM O-ring & Pipe Gaskets
- Everything needed for a complete install

Fitment:
2001–2007 Chevy/GMC 2500HD & 3500HD (LB7, LLY, LBZ)
2011–2016 Chevy/GMC 2500HD & 3500HD (LML)
2017–2019 Chevy/GMC 2500HD & 3500HD (L5P)
**Will NOT fit 2007.5–2010 LMM due to EGR cooler interference**