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Ships within 48 hours · Estimated delivery Aug 31 - Sep 5
Forget weak factory settings—these tunes are built for serious Duramax owners who demand real performance
eliminating the factory EGR provision for a cleaner
Sealing — stainless gaskets and automotive-grade O-rings matched to the application (Includes Turbo Gasket for 23-26)
Users must physically remove their original E46 ECM from their vehicle and ship it to HP Tuners’ headquarters for servicing
OEM-grade coolant reroute hose
GDP Downpipe Back Exhaust - Single (2011-2015 GM 2500/3500 6.6L Duramax LML) dieselr_signature Forget weak factory settings—these tunesBuilt to Last: Constructed from heavy duty T409 stainless steel for maximum durability. Mandrel bent for a perfect fit and improved airflow. Improved flanges ensure a leak free connection. Effortless Installation: Includes clamps, pre welded contour bent hangers, and strong flanges for a hassle free installation. Performance Gains: Expect increased horsepower, lower Exhaust Gas Temperatures (EGTs), and improved airflow. Unleash your truck's potential
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