Wehrli 100720 4in Intake Resonator Pipe Kit | 2020-2025 Silverado/Sierra 2500HD/3500HD 6.6L

Features:

• Dress up your engine bay and remove the plastic turbo resonator box.
• Reduces air restriction allowing more air flow to turbo
• Removes silencers for more aggressive turbo and engine sound
• No tuning required, bolt on!
• Will fit on stock trucks with no other modifications necessary.
• Installs easily with basic hand tools

More Airflow to the Turbo

If you're ready to ditch the bulky factory resonator and let your L5P breathe a little better, the Wehrli 4in Intake Resonator Pipe Kit is exactly what you need. Designed specifically for 2020–2025 Chevrolet Silverado and GMC Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax, this kit replaces the plastic turbo resonator box with a clean, high-flow aluminum pipe that brings both form and function to your engine bay. From the jump, this upgrade does two big things: it reduces airflow restriction and brings out a more aggressive turbo sound. By removing the factory silencers, you're freeing up the intake path, which allows more air to reach the turbo faster. The difference is subtle but noticeable—quicker throttle response and that crisp turbo whistle that many diesel owners love. Plus, the pipe cleans up the look under the hood by getting rid of the clunky stock resonator and replacing it with a powder-coated 4-inch pipe that looks sharp and performs even better.

Retains OEM Airbox and Filter Panel

One of the best parts of this pipe kit is how it retains your OEM air filter box and filter panel. That means no custom tuning, no compatibility headaches, and maintenance stays just as simple as before. This kit bolts right on using basic hand tools, and it’s built to fit trucks in factory configuration—no need for additional upgrades or modifications. It includes high-quality silicone boots, T-bolt clamps, and everything you need for a tight, secure installation. This pipe replaces GM part numbers 84841229, 84841225, and 84262962, and is made to fit perfectly with the factory VGT turbo setup. Just keep in mind, it’s designed to work only with the OEM air intake system. It’s not compatible with aftermarket intakes like S&B, Banks, or AFE.

Fits: 2020, 2021, 2022, 2023, 2024, 2025 GM 6.6L Duramax

Kit Includes:

• 4" Intake Pipe
• Silicone Hump and Straight Boots
• T-bolt Clamps
• Powder coating
• NO Tuning required, bolt on!
  

Application Note: Will only fit with the OEM air filter box, NOT COMPATIBLE with the S&B, Banks, AFE, or other aftermarket air intakes

Replaces the following GM Part Numbers: 84841229, 84841225, 84262962