20-22 GM L5P 6.6L Duramax Calibrated Power Stealth STR Turbo

Order your upgraded turbo today! The L5P Stealth STR is the best replacement turbo for your stock 2020, 2021, and 2022 6.6L L5P Duramax. While capable of providing enough airflow to support up to 650 RWHP, this stock-appearing unit still lights quickly and is great for daily driving, towing, and putting Powerstrokes in their place.

If you have been looking at other "64mm", "Stage 1",  or stock turbo replacements this is a game changer. This turbocharger does not need custom tuning or other upgrades to get superior performance. Box programmers and inline modules work seamlessly with the L5P Stealth STR. 

Don't be fooled by the imitators! We've been building custom turbos and providing custom tuning for more than 15 years. We were the first custom tuners to work on the L5P Duramax platform and know exactly what these trucks need to go to the next level. 

• Airflow to support 650HP
• Up to 600 RWHP with stock emissions equipment and basic supporting mods
• 41 psi boost @ Sea Level
• Custom Billet Compressor Wheel
• 11-Blade wheel provides a wide efficiency range allowing users to tow without risk of surge
• Lightweight and high strength
• Provides 74 lbs/min mass airflow compared to 60lbs/min stock
• No Surge (Even when lugging)
• Brand New parts and electronics
• No Core Charges
• Built from New Genuine GM/Borg units
• Designed and spec'd by Tuners
• Easy to tune (no tuning required)
• Works with box tuners

This Turbo is Designed for you if ...

• You are using a box tuner or no tuning at all
• Daily drive your truck
• Have Reliability and Performance as top priorities
• Tow with your truck
• Want More Power and excellent street manners!

Do you need an Actuator?

If you're wondering whether or not you should buy an actuator to compliment your Stealth turbo, allow us to share our thoughts.  The L5P actuator has a very low failure rate in the field.  The fact that it's well cooled and not in close proximity to the hot parts of the turbo means that it's out of harm's way.  Unless you're experiencing codes that indicate actuator issues or know for a fact that your actuator is somehow damaged, we would suggest saving your money and retaining your factory actuator.  

Add on a Stealth Boost Tester.

Boost leaks can kill diesel engines. They cause higher EGTs, decrease your power, and lower fuel economy. Properly being able to test your entire charged air system is essential to getting peak performance and longevity out of your diesel engine. Charged air systems include everywhere from the turbocharger to the intake manifold. Your intercooler system, Exhaust Gas Recirculation components, and even the Turbocharger compressor cover can all develop boost leaks.

With the Stealth Boost Tester, you can now easily and accurately test your charged air system. The unique advantage of this boost tester is that it can accurately test the entire charged air system in seconds. This kit is made entirely from premium parts, designed to last, and built to rigorous standards. The regulator itself is made from metal and uses high-quality seals that combine to make a boost tester designed to last. You'll also notice the use of a high-quality liquid-filled gauge that prevents erratic readings from pressure spikes and external vibrations. The faceplate adapters that attach to your turbo are also made from high-quality billet aluminum. They are made and assembled in the USA to provide a perfect seal when testing your charge system. This boost tester is exactly what you need if you work on diesel trucks regularly or just want to check the condition of your engine's charge system. Here's what you can get:

• Heavy Duty Regulator
• Extremely Accurate
• Precise control over test conditions
• Built to last for a lifetime

• CNC Precision-Cut Adapter
• Perfect Fit
• Clean look
• Made from high-quality materials
• Intelligent design

Warranty: All Stealth Series turbos offer our Unlimited Mile, 1-year manufacturer warranty for quality and craftsmanship. For warranty inquiries please contact [email protected]

The Stealth L5P STR Turbo by Duramaxtuner.com is specifically designed for the 2020, and 2021 Chevy Silverado and GMC Sierra 2500 and 3500 models.  It replaces OEM Part #s 12709701044, 11547786, 12683985, 12689094

Calibrated Power: DT118000002001