There are numerous turbo upgrades on the market for 6.6L Duramax. However, the majority of these upgraded turbos require you to eliminate the factory VGT (Variable Geometry Turbo) in favor of a non-VGT, also requiring a different mounting, and numerous other items to make the conversion. If you’re like many and just want a good, reliable turbo that you can literally drop in place of the original and get a big boost in performance, this Screamer Turbo from BD is your answer. The drop-in, stock-appearing Screamer turbo for the 2011-2016 LML Duramax utilizes modern turbo technology that delivers increased airflow without compromising on low end response. Boost pressure can be increased to improve horsepower potential. Tests with the same tune and fuel quantity showed increased power output and a decrease in peak EGT’s. The Duramax Screamer turbo works with any “box” tuner with further improvements achieved with custom tuning.