Stage 1 GT37/40 VNT 100% drop in replacement turbocharger for the LML Duramax engines. These units feature a 64mm billet compressor wheel (work stock legal) paired with a high flow 10 blade 66mm turbine wheel. Every unit is built using on OE replacement parts including the GT40 wide bearing and 360 thrust system for maximum durability. With proper tuning these units spool quicker then stock while improving performance and fuel mileage and also lowering egt's. All units have a 1 year unlimited mileage warranty and performance guarantee. Core charge does apply.