The Calibrated Power Stealth 64 VGT Drop-in Turbocharger for your 2007-2009 Cummins is a must have upgrade! The Stealth replaces the stock turbocharger, bolt–for–bolt, literally drops in place. But that’s where the similarities of this stock appearing turbocharger end. The 64mm compressor wheel maintains stock driveability and spool-up while being capable of 650 RWHP! Once you need the extra power, the Stealth 64 delivers a real, seat–of–the–pants experience. Along with driveability and power, the Stealth 64 helps maintain lower exhaust gas temperatures (EGT’s) at high load. If you’re looking to upgrade or replace your stock turbocharger, the Stealth 64 offers the best balance between power and driveability in a drop–in, stock–appearing turbocharger.