Featuring the latest Borg Warner 64mm compressor wheel and new modified wastegate, allowing 210% more flow through the wastegate! The new wastegate configuration allows for a very quick-spooling 65mm turbine wheel to be used, while flowing on top end with a 71mm turbine wheel, without compromising the spool-up. The exhaust outlet size is 4.40". This turbo comes with a polished compressor housing at no extra charge. This turbo is perfectly engineered to offer excellent driveability, while making a huge drop in EGT's, and large horsepower gains. Spool up is very reasonable. This turbocharger will out spool the competition every time, and flows tons of air to 550 hp. The huge shaft means no more breaking turbos. If you have performance injectors, an Edge, Bully Dog, PPE, Hypertech, Quadzilla, or any other performance chip, your truck is screaming for mercy because of the high EGT's. This turbo is a must to keep those temps in check. Comes with a 1-year, no hassle, 1-time replacement warranty. 12 & 24 valve engines, need a 4 inch exhaust downpipe. New Silicone Intercooler Hose that is required for 12v & 24v trucks come in your choice of colors (Black, Blue, Red, Yellow, Purple, or Green). FREE Shipping!