Calibrated Power Stealth Mach 2 (67mm) Drop In VGT Turbo | 2011-2016 LML

Stealth Mach 2 (67) VVT Turbo for LML Duramax (2011-2016)

The Stealth Mach 2 (67) is a high-performance, stock-appearing drop-in turbo for 2011-2016 LML Duramax trucks. Built with an upgraded billet compressor, oversized turbine, and proprietary HFV technology, it delivers fast spool-up, lower EGTs, and airflow to support up to 800 HP.

Key Features

• Supports up to 800 HP
• Up to 650 RWHP with stock emissions + basic mods
• Proven 800+ RWHP in competition setups
• 67mm 11-blade extended tip billet compressor wheel
• 70.2mm 10-blade 713C nickel alloy turbine wheel
• HFV (High Flow Vane) Technology
• 360° thrust bearing with liquid-cooled center section
• Custom anti-surge compressor cover and ported housings
• Direct bolt-on, stock-appearing design
• No core charge; all new parts and electronics

Benefits

• Faster spool-up with strong throttle response
• Lower EGTs under heavy load and towing
• Improved boost-to-drive pressure ratio (near 1:1)
• Maintains factory exhaust brake functionality
• Wide, usable powerband with strong top-end performance
• Distinctive Stealth turbo sound
• HFV Technology: Custom vane system allows larger turbine and improved airflow
• Compressor: 67mm billet wheel (up to 81 lbs/min vs 60 lbs/min stock)
• Turbine: Oversized design reduces drive pressure and improves efficiency
• Optimized Geometry: Larger vanes and turbine increase high-load performance

Fitment

• 2011-2016 Chevrolet Silverado 2500HD/3500HD
• 2011-2016 GMC Sierra 2500HD/3500HD
• 6.6L LML Duramax