Our custom-built Mach 2 (67mm) compressor wheel is specifically designed to maximize peak power while maintaining a wide, useable powerband. To fit the monster compressor wheel we've developed a unique, OEM appearing, anti-surge ring, which nestles in the factory compressor cover. Matching the class-leading compressor performance meant updating the center section which is fitted with a 360-degree thrust bearing to increase reliability under heavy load transitions. We even updated the wastegate to make sure you have the most amount of power and the quickest spool-up.

With the all-new compressor side and center section put together a turbine wheel and exhaust housing upgrades had to be made. The LB7 Stealth Mach 2 (67) features the largest turbine available in an IHI-style (stock LB7 turbo) frame. This dramatically reduces drive pressure and allows for serious power production even at high RPM where the IHI typically falters. Our monster turbine helps you achieve as close to a 1:1 ratio between drive and boost pressure. This not only helps make more power but also manages EGT's under heavy load.

Please Note: This turbocharger does not fit on California emissions-equipped trucks.

The Stealth Mach 2 (67) has undergone testing to demonstrate that it complies with federal emissions regulations. This testing provides the reasonable basis required by the standards defined by the EPA. Here you can find a PDF that documents this testing.

The unique advantage of having our tuning experts work on this turbocharger design can’t be understated. DuramaxTuner’s experience with the particulars of how the Duramax platform responds to tuning adjustments and airflow changes was a crucial component in building you the perfect turbo upgrade.

Building the LB7 Stealth Mach 2 (67) meant designing a turbo that's safe to tow reasonable loads with, fun to drive every day, and a class-leading competitor. If you think street-able, clean, stealthy power is cool then this is the turbo for you! We left no stone unturned when engineering the LB7 Stealth Mach 2 (67). Our custom profile on the compressor wheel matched to the custom turbine wheel means you get power and drivability.

• 800 HP Peak Power
• Direct fit for
  • 2001 6.6L Duramax 
  • 2002 6.6L Duramax 
  • 2003 6.6L Duramax 
  • 2004 6.6L Duramax
• Dyno Proven
• Custom Billet Compressor Wheel
• Stealth HIGH-FLOW Turbine Assembly
• Engineered Anti-Surge Compressor Cover
• Stock Appearing 
• Quick Spool-Up
• Wide Torque Curve
• Useable Horsepower

This Turbo is Designed for you if you...

• Daily drive your truck
• Reliability and Performance are your top priorities
• Have a built short block or plan to build your engine in the future
• Prefer to simply swap your old turbo out for a new one
• Want more power when you need it, but still have excellent street manners
• Have installed or plan to install modified injectors
• Have installed or plan to install a built transmission
• Have installed or plan to install dual Cp3's or stroker Cp3