2011-2016 Duramax S300 Non-VGT Bolt-In Turbocharger (C62STD1116)

If you're browsing for a Duramax, you might find yourself wondering; What's the difference between VGT and Non-VGT Turbochargers? Will it make that much of a difference? Just like everything in life, there are benefits and disadvantages to everything, Variable Geometry Turbochargers do offer quicker spool-up, improved throttle response, low-end torque, and power delivery across a wider RPM range. However, their complex design can be costly, and have the potential of vanes sticking due to carbon build-up. 

Fixed Geometry Turbos, which is what this is, have a simpler design, consistent airflow, and provide higher horsepower at higher speeds. This particular Smeding Diesel Turbocharger is the only one of its kind operating at a lower drive pressure than any other VGT on the market and capable of 850HP! Low drive pressure means low cylinder pressure, resulting in less strain on your internals and head gaskets.