Stealth STR Turbo (2024-2025 6.6L L5P / L5D Duramax)

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

Features

• Extra airflow to make 80-100rwhp over 'Tune only' L5P
• Works with box tuners, custom tuning, or without tuning
• Major EGT control improvments compaired to stock
• Built to last with more durable components than stock
• Lighter rotating assembly than stock
• Lightning fast spool-up and immediate throttle response
• Loud turbo whistle from 9-blade turbine
• Retain your factory exhaust brake
• Designed to prevent compressor surge even while towing
• Brand New Parts - No core charges

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.