Call (800) 601-8072
Available Weekdays 8:00AM - 5:00PM PST
Latest Episode

Speed School Podcast with Gale Banks

Monster Exhaust System

Buy Now For $628.00

Add To Cart
Monster Exhaust System

Buy Now For $628.00

Add To Cart
Banks 5 inch exhaust for the 2020+ Duramax L5P  Edit alt text
Banks 5 inch exhaust for the 2020+ Duramax L5P parts laid out
Banks 5inch exhaust and monster slash cut tip vs the stock 2.85 inch outlet.
Size comparison of the banks monster exhaust tip vs a can of Tip
Installed photo of the Banks Monster Exhaust on a 2022 GMC 2500 HD

Monster Exhaust System

89% lower backpressure from DPF, 15% lower exhaust exit temp
5-inch Single Exit, Black SideKick Tip
For 2020-2023 Chevy/GMC 2500/3500 6.6L Duramax, L5P
Prices increase after 3/31


Add Ons

No add-ons selected
Banks Ram-Air<sup>&reg;</sup>
Banks Ram-Air®
(Oiled Filter)
Increases Mass Air Flow by 58% vs Stock
Floating assembled photo of the Banks Boost-Tubes for 2020+ L5P Duramax
Boost Tube Upgrade Kit
Increases throttle response and reduces turbo lag
Free Shipping on orders over $100 (48 Contiguous US)*

5-inch aluminized steel constant-diameter DPF-back system. Patented negative backpressure SideKick tip helps lower exhaust exit temps by 15%. Improves flow and cuts backpressure by 89% from the DPF and 9% at the turbine inlet, allowing the engine to produce more horsepower. Includes Huge Cerakote Black Patented SideKick tip.

US Patent #5,581,111 S1

CARB E.O. Not Required

Fitment Note


✓:Double Cab Short Bed
✓:Double Cab Long Bed
✓:Crew Cab Short Bed
✓:Crew Cab Long Bed

Does Not Fit

✗:Single Cab Long Bed
✗:Dually DRW Vehicles


Banks Power introduces the new 5-inch Monster Exhaust designed specifically for the 2020-2023 GM 6.6L Duramax L5P 2500/3500 HD pickup trucks. The DPF-back exhaust system features constant-diameter 5-inch mandrel-bent Aluminized Steel tubing and a massive patented tip which virtually eliminates backpressure after the DPF and prevents trailer meltdown.

Key Features

  • 5" aluminized steel constant-diameter DPF-back exhaust system.
  • 15% reduction in exhaust temperature 2 feet behind the tip during regen
  • Huge patented 6.5" x 7.5" ob-round slash-cut exhaust tip
  • Cerakote Black stainless tip will not turn brown with heat
  • 89% less backpressure than stock
  • Ob-Round Exhaust Tip Patent No. D558,111
  • Fits trucks with aftermarket airbags
    see fitment notes section above
  • 1-Year Limited Warranty

Questions? Contact Support

Change Your Look

Duramax owners can choose from two huge patented 6.5 x 7.5-inch ob-round slash-cut exhaust tips: chrome-plated polished stainless steel or high-temp Cerakote matte black.
And, unlike other brands, Banks' Cerakote black tip will not turn brown with heat.
Banks Power, Monster Exhaust, 2500, 3500, Monster Exhaust for 2020+ Duramax L5P

Drop The Pressure

Banks patented negative back-pressure tip virtually eliminates back-pressure after the DPF. With a side-draft rocket nozzle-like tip, exhaust gasses are literally sucked out of the end of the exhaust.
With pressure sensors installed, this negative exhaust pressure resulted in an impressive 9% reduction all the way back to the turbine inlet.
Banks Power, Monster Exhaust, Obround tip, negative back pressure simulation

Don't Be Deceived

With the stock exhaust nozzle measuring 2.85-inch compared to the Monster Exhausts massive 5-inch outlet, the Banks system offers a 192% greater flow area than stock.
The Monster Exhaust boasts 89% less backpressure than stock at the DPF and 9% lower at the turbine inlet, leading to more power and increased fuel economy.
Banks Power, Monster Exhaust, Obround tip vs OEM dual

Drop That Heat

The Monster Exhaust also provides a 15% reduction in exhaust temperature two feet behind the tip during regen!
The Diesel Particulate Filter (DPF) on the Duramax L5P is cleaned through regeneration in which scorching exhaust gas temperatures can last up to 20 minutes while driving.
Unlike the stock Duramax exhaust, which directs a prolonged jet-like blast of super-heated exhaust gas directly at anything being towed, the Monster Exhaust is aimed out to the side of the truck.
3D Simulation of what obround tip difusing hot gas to atmosphere
This allows ambient air to diffuse the heated gas, eliminating the risk of melting a trailer, which has been reported by many Duramax owners.