Drop In Turbos

Lower exhaust gas temperatures (EGTs), improve spool response, and unlock reliable horsepower on your 2004.5–2005 Chevy Silverado or GMC Sierra 2500HD/3500HD with our selection of LLY Duramax drop-in upgraded turbochargers. The factory Garrett GT3788VA variable-vane turbocharger delivers solid low-end response, but its restrictive turbine geometry, small compressor wheel, and weak factory thrust bearings limit peak airflow and cause elevated drive pressure under heavy towing or aggressive tuning. Drop-in performance turbos eliminate these bottlenecks without requiring custom pedestals, modified oil lines, or complex piping changes. Featuring oversized billet compressor wheels, upgraded high-flow turbine wheels, reinforced 360-degree thrust bearings, and modified vane assemblies, these units bolt directly in place of the stock turbo to deliver faster spool-up, cooler operating temperatures, and strong mid-to-top-end pulling power. We supply premium drop-in VVT turbochargers from industry-leading manufacturers like Calibrated Power/Stealth, BD Diesel (Screamer), Fleece Performance (Cheetah), and Garrett (PowerMax). Browse our complete lineup of 6.6L LLY Duramax drop-in turbos below to maximize towing capability and street performance with simple bolt-on installation.