2011-2016 Duramax LML Stealth Mach 2 Turbocharger (CPS200354)

Description

Fits

Year	Make	Engine
2011-2016	Chevrolet/GMC HD	6.6L LML Duramax

The LML Stealth Mach 2 67 Turbo is a stock-appearing direct replacement turbocharger for 2011-2016 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks with the 6.6L LML Duramax diesel engine. Built for streetable power, towing performance, and competition potential, this turbo is designed to spool quickly, control EGTs under load, and support strong power across a wide operating range.

With a billet compressor wheel, extra-large turbine wheel, custom-cut compressor cover, custom exhaust housing, and HFV High Flow Vane technology, the Stealth Mach 2 67 delivers increased airflow and better high-load efficiency while retaining stock-appearing fitment.

Part Number: CPS200354

Supersedes: DM1DH1070303000

Features

• 800+ RWHP peak power potential
• Up to 650 RWHP with stock emissions equipment and basic supporting modifications
• 67mm billet compressor wheel and 70.4mm turbine wheel
• 11-blade compressor wheel provides a wide efficiency range for towing without risk of surge
• 360-degree thrust bearing
• Custom 11mm vanes and matched unison ring
• Direct bolt-on installation
• Great for daily driving and towing
• Oversized custom turbine wheel improves EGT control and lowers drive pressure
• HFV High Flow Vane technology

Notes

• No core charge
• Higher power levels require proper supporting modifications
• Recommended supporting upgrades include air intake kits, upgraded intercooler piping, and emissions compliant performance tuning

Additional Info

Billet Compressor Wheel

• 67mm compressor wheel is milled from high-strength 7075 aluminum
• TCT design is engineered to maximize peak power
• Matched to an OEM-appearing anti-surge compressor cover
• Compressor cover design is optimized for MWE groove width, MWE groove placement, diffuser clearance, and diffuser shape

Turbine Wheel

• 70.4mm turbine wheel is significantly larger than the factory turbine
• 10-blade design produces a distinctive exhaust sound
• Lowers drive pressure under high-load conditions
• Improves efficiency for better EGT control

HFV High Flow Vane Technology

• Proprietary variable vane cage and nozzle ring assembly
• Allows use of a larger turbine wheel for maximum high-load efficiency
• Custom vanes and matched unison ring support higher exhaust flow
• Helps improve spool-up, power output, and EGT management compared to factory nozzle rings

Warranty

• One Year Limited

OE Replacement Part Numbers

• 848212-5002S
• 12642314
• 12642129
• 800799-0002
• 800799-0003
• GT3788VA
• Garrett 3788