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2011-2016 LML Duramax Stealth Mach 2 67mm Drop In VGT Turbo

- 800+ RWHP Peak
- Billet Compressor & Turbine Wheel
- 360 degree Thrust Bearing
- Custom Vanes & Unison Ring
- Direct Bolt-On
- Great Daily Driving/Towing
Availability: Raw in stock and ships in 3-5 business days. 10-15 business day lead time for powder and ceramic coat options.
Shipping: This Product cannot ship to the state of California
NOTE: This product has the following shipping restriction(s):
  • This product cannot be shipped to California
Was: $2,975.00
Sale: $2,677.50
Save: 10%
Save: $297.50
5 5 1

Customize Your Item

- Powder Coating -
 * required
- VGT Turbo Heat Blanket -
 * required
- Gasket Kit -
 * required
- VGT Exhaust Housing Finish -
 * required
NOTE: This product has the following shipping restriction(s):
  • This product cannot be shipped to California


The LML Stealth Mach 2 (67) is a stock appearing, direct replacement for the 2011-2016 LML Duramax. The upgraded billet compressor & extra-large turbine wheel are perfectly matched to Calibrated's custom cut compressor cover and exhaust housing.

This turbocharger features High Flow Vane (HFV) technology, a proprietary customization of the variable vane cage and nozzle ring assembly. This advancement allows the use of a larger turbine wheel for maximum high-load efficiency. Stealth turbos featuring the HFV upgrade are capable of producing more power, spooling up quicker, and managing EGTs better than other turbochargers limited with factory nozzle rings.

Your truck is going to experience increased performance across a wide operating range due to the HFV assembly, oversized turbine wheel, and billet compressor wheel. Built from brand new parts, this turbocharger does not require a core charge. Turbo comes ready for installation. You should strongly consider custom tuning to go with this turbocharger upgrade. Deletes are not required. We have made up to 650 RWHP when matching this turbo with Custom Emissions Equipped Tuning.

The Stealth Mach 2 67 VGT is an easy to install upgrade that spools up quickly, controls EGT's under heavy load, allows turbine / exhaust braking during towing scenarios, and kicks ass when leaned on. Building this line of Stealth's meant designing a turbo that would be safe to tow with, fun to drive every day and perform at competitions. If you think street-able, clean, stock-appearing power is cool then this is the turbo for you!

To compliment this turbo we highly recommend our High Flow Intake Bundle Kit to maximize performance, EGT control, and spool up.

Package includes:

  • Airflow to support 800HP
    • Up to 650 RWHP with stock emissions equipment and basic supporting mods
    • Tested in competition setups with extensive supporting mods to make 800+ RWHP
  • Custom Billet Compressor Wheel
    • 67mm, 11-Blade wheel provides wide efficiency range allowing users to tow without risk of surge
    • Lightweight and high strength
    • Provides 81 lbs/min mass airflow compared to 60lbs/min stock
  • Oversized Custom Turbine Wheel
    • Low drive pressures at high load
    • Efficiency improved to better control EGT
    • 10 blade design produces distinctive exhaust sound
  • HFV (High Flow Vane) Technology
    • Custom Vane/Nozzle Ring Assembly
    • Exclusive design produced in-house specific to this application
    • Taller and wider vanes match larger turbine to provide superior high-load efficiency
    • Retain factory exhaust brake and quicker throttle response
  • Brand New parts and electronics
    • No Core Charges
    • Built from New Genuine GM/Borg units

This custom 67.7mm compressor is milled out of high strength 7075 Aluminum. It's TCT design is engineered to maximize peak power. To fit that wheel Calibrated developed a unique, OEM appearing, anti-surge equipped compressor cover. Redesigning the compressor to maximize power and driveability meant pouring over every detail of from MWE groove width and placement to diffuser clearance and shape.

The LML Stealth Mach 2 67 center section is fitted with a 360 degree thrust bearing and features liquid cooling to increase reliability and minimize thrust wear during competition use.

The turbine side innovation rivals the compressor side. The Mach 2 turbine dwarfs the factory turbine and the Garrett 4094VA in every way. The turbine inducer is taller, allowing much higher flowing vanes which are actuated with a matched unison ring. The LML Stealth Mach 2 67 features the largest turbine and vanes available in this frame. Increasing turbine size dramatically reduces drive pressure under heavy load, helping you achieve nearly a 1:1 drive to boost ratio under most operating conditions. Controlling drive pressure helps make more power and significantly lowers EGT's.

Replaces the following OEM Part numbers: 848212-5002S, 12642314, 12642129, 800799-0002, 800799-0003, GT3788VA, Garret 3788

The Stealth Mach 2 (67) 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.



Shipping Information

  • Item Requires Shipping
  • 50.0 lbs.
  • W15.0000” x H15.0000” x L15.0000”
  • This item ships in its own box.
  • This Product cannot ship to the state of California

Customer Reviews

Comment Total Reviews (1)

Stealth67 is pretty Stealthy
  • Currently 5/5 Stars

Reviewed by:

Product ownership: Less than 1 year

Purchased from: Wehrli Custom Fabrication - WCFab

I bought this turbo in junction with the high flow bundle kit and the 10mm CP3 conversion kit. This turbo has changed my entire trucks’s driving style. It drives great and is a beast of a turbo when used in any situation. I’ve owned this turbo for 6 months and I truly can’t get enough of hearing this thing whistle and spool. I’m only running a 45hp tune and my truck feels like it just wants be unleashed. This turbo is worth every penny and WCFab is truly a quality company.

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