Fitment Information

• Chevy Silverado 2500 / 3500 6.6L (2020, 2021, 2022, 2023) 
• GMC Sierra 2500 HD / 3500 HD 6.6L (2020, 2021, 2022, 2023) 
• Does Not Fit Single Cab Long Bed, Dually DRW Vehicles, 2023.5 & 2024 Model Year
• Fits Double Cab Short Bed, Double Cab Long Bed, Crew Cab Short Bed, Crew Cab Long Bed

Note

• Does Not Fit 2024 Model Year Trucks. Installing on a will result in a check engine light.
• Exhaust will not fit late 2023 model year trucks. Beginning in mid-2023, GM updated the ECM which altered several the emission sensors including in the exhaust. You can check for this change by looking for a dual sensors on the intake manifold. See Photo.
  

Emissions Compliance

• This exhaust system does not require a CARB Executive Order (EO) because it does not modify or replace emissions-controlled components. It is intended for use on vehicles where exhaust modifications are not subject to CARB EO requirements.

Specs & Features

• 5" Constant-Diameter DPF-Back Exhaust – Maximizes exhaust flow efficiency
  
• Up to 89% Less Backpressure at DPF – Frees up horsepower and improves fuel economy
  
• 9% Less Backpressure at Turbine – Helps turbo spool faster and run more efficiently
  
• Mandrel-Bent 409 Stainless Steel – Durable, corrosion-resistant construction
  
• 15% Lower Exhaust Temps During Regen – Reduces heat buildup behind the vehicle
  
• Massive 6.5" x 7.5" Ob-Round Tip – Aggressive look with real performance function
  
• Chrome or Cerakote Black Tip Options – Heat-resistant finish that won’t discolor
  
• SideKick Tip Design – Pulls exhaust gases out and directs heat away
  
• 192% Greater Flow Area vs Stock – Huge upgrade over restrictive factory exhaust
  
• Fits Trucks with Aftermarket Airbags – No clearance compromises
  
• Designed for 2020–2022 Duramax L5P 2500/3500 HD – Direct-fit performance upgrade
  
• 1-Year Limited Warranty – Built with confidence and reliability

Product Description

The factory exhaust system on your L5P Duramax is more restrictive than it looks, especially once you start towing or pushing the truck harder. This Banks Monster Exhaust replaces that entire bottleneck with a full 5-inch constant-diameter system that dramatically improves airflow. With up to 89% less backpressure at the DPF and additional reduction at the turbine, your engine can expel exhaust gases more efficiently—resulting in quicker turbo response, stronger power delivery, and improved fuel economy.

What really separates this system is the engineered SideKick tip. It doesn’t just sit there looking aggressive—it actively helps pull exhaust gases out while directing extreme heat away from your truck and anything behind it. During regen cycles, when temperatures spike, this side-exit design helps reduce heat by up to 15%, protecting your trailer and surrounding components. Backed by Banks’ reputation for real-world tested performance, this is more than just an exhaust upgrade—it’s a smarter, more efficient way to get the most out of your Duramax.

Redline360 sells only genuine and authentic Banks Power products.