The 3rd Gen Stealth 64 is an upgraded, drop-in, replacement turbo for 2003-2007, 5.9L Cummins. It is designed to bolt in and requires nothing other than removing the factory turbo and dropping this one in its place. The turbo features a custom profile, 64mm (actual measurement 63.5mm) billet wheel perfectly mapped to a modified compressor cover and 65mm, 10-blade turbine inside the HE351’s 9cm housing. The 3rd Gen Stealth 64 is one of the quickest spooling turbos we have tested for the 5.9L Cummins. Even the most experienced enthusiast has a hard time telling the difference between a stock HE341/HE351 and a Stealth 64 during light throttle, daily driving. This is directly tied to the tight exhaust housing and lightweight turbine wheel. If you are going to daily drive your Cummins, consider a quick spool-up a “must-have”. Stock injector / built transmission trucks can expect an easy 100+ RWHP (Rear Wheel Horse Power) gain with no tune adjustment required. With the quick spool and improved top-end power, this is a great turbo for towing performance. If you like to use your truck for work and have to tow something the Stealth 64 is up to the task. We have measured excellent EGT control without sacrificing performance. This charger is the perfect fit for those of you with future plans for a twin kit. Take your time and put the build together in stages. Start by upgrading the factory charger with an easy drop-in and build off it down the road. In a compound or twin kit, we have many customers making 950-1,000 HP! Of course, those builds include a more extensive list of supporting modifications. Still, it is nice to know there is a proven formula to follow.