L5P / L5D Stealth STR Turbo (2024- 2025)

Don't Just Replace Your Stock L5P/L5D Turbo!

There's no better feeling than getting to upgrade your parts instead of just replacing them. That's exactly why we made the Stealth STR for 2024 and 2025 6.6L L5P Duramax's. Designed to improve turbo performance and reliability while still coming in around the cost of a stock turbo replacement.

The STR has also been designed with easy tuneability in mind. Unlike other "drop-in" upgrades that require much more than just dropping in a turbo to get up and running. The STR requires no custom tuning to get up and running and has been designed to be as simple to tune for as possible. Say goodbye to lenthy tuning and multiple tune revisions!

L5P / L5D Stealth STR Turbo

• Airflow to support up to 625HP
  
  • Supporting modifications required
  • Tested and proven to support up to 625HP even with stock emission's equipment

• Custom Billet Compressor Wheel
  
  • 63mm 7x7-Blade extended tip billet compressor wheel
  • Stronger and lighter than stock
  • Provides a wide efficiency range
  • Lightweight and high strength billet construction
  • Provides 66lbs/min mass airflow compared to 60lbs/min stock

• Custom 9-Blade Turbine Wheel
  • Larger than stock
  • More agressive blade angle for better exhaust energy capture
  • Sized to maximize throttle response
  • 50% Thicker turbine blades for added heat tolerance
  • Lower drive pressure under high loads
  • Lower EGT's under high loads
  • Boosts the effectiveness of compressor wheel upgrade
  • Produces a distinctive Stealth turbo whistle

• Rotating Assembly (Compressor and Turbine Wheels)

  • 6% lighter than the stock rotating assembly
  • Provides lightning fast spool-up
  • Boosts turbo efficiency and lowers drive pressures
  • Precision balanced in-house

• Brand New Parts
  • No Core Charges

This Turbo is Designed for you if you...

• Need a stock turbo replacement for your 2024+ 6.6L Duramax
• Want to upgrade your stock 6.6L L5P turbo
• Have reliability as your top priority
• Have a completly stock or lighly modified truck
• Daily drive or tow with your truck often
• Want more power with excellent street performance

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. 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
• Testes Entire Charge system
• Precise control over test conditions
• Easy to use and read
• Premium parts built to last for a lifetime
• High-quality seals
• Liquid gauge prevents erratic readings
• Metal construction

• CNC Precision-Cut Adapter
• Perfect Fitment
• Clean look
• Intelligent design
• Made from high-quality materials 
• Made and assembled in the USA

Important Notice:

This turbo must only be operated with tuning that uses stock Minimum and Maximum Vane Position tables. Failure to do so can lead to excessive exhaust pressure and boost which may shorten the life of the turbo or engine and may void the turbo warranty.

Damage caused as a result of non-stock vane position tuning modifications will be the responsibility of the owner, not Calibrated Power Solutions Inc. If you have any questions or concerns please contact CPS at 815-568-7920.

Warranty: All Stealth Series turbos offer our Unlimited Mile, 1-year manufacturer warranty for quality and craftsmanship. For warranty inquiries please contact sales@duramaxtuner.com

View The Vehicle Emissions Testing Report: Click Here

The 2024-2025 L5P / L5D Stealth Mach 2 Turbo by Duramaxtuner.com is specifically designed for the 2024 and 2025 Chevy Silverado and GMC Sierra 2500, 3500, 4500, 5500, and 6500 models as well as 2024+ International CV (Medium Duty) models. It replaces OEM Part #s 12709701044, 11547786, 12683985, 12689094