Monster® DPF-Back Ex

Banks Power introduces the new 5- in. Monster Exhaust designed specifically for the 2020-2021 GM 6.6L Duramax L5P 2500/3500 HD pickup trucks. The DPF-back exhaust system features constant-diameter 5- in. mandrel-bent Aluminized Steel tubing and a massive patented tip which virtually eliminates backpressure after the DPF and prevents trailer meltdown. Up The Flow. With the stock exhaust nozzle measuring 2.85- in. compared to the Monster Exhausts massive 5- in. outlet, the Banks system offers a 192 percent greater flow area than stock. The Monster Exhaust boasts 85 percent less backpressure than stock, leading to more power and increased fuel economy. Change Your Look. Duramax owners can choose from two huge patented 6.5 x 7.5- in. ob-round slash-cut exhaust tips: chrome-plated polished stainless steel or high-temp Cerakote matte black. And, unlike other brands, Bankss Cerakote black tip will not turn brown with heat. Drop That Heat. The Monster Exhaust also provides a 15 percent 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. This allows ambient air to diffuse the heated gas, eliminating the risk of melting a trailer, which has been reported by many Duramax owners.

Additional Information

Monster® Exhaust System; 5 in. Inlet; Single Exit; 6.5 in. SideKick Black Tip;

Application Summary

2020-2021 Chevy/GMC 2500/3500 6.6L Diesel: 2021 GMC SIERRA 3500 HD 6.6L DIESEL 2021 GMC SIERRA 2500 HD 6.6L DIESEL 2021 CHEVROLET SILVERADO 3500 6.6L DIESEL 2021 CHEVROLET SILVERADO 2500 6.6L DIESEL 2020 GMC SIERRA 3500 HD 6.6L DIESEL 2020 GMC SIERRA 2500 HD 6.6L DIESEL 2020 CHEVROLET SILVERADO 3500 6.6L DIESEL 2020 CHEVROLET SILVERADO 2500 6.6L DIESEL

Part Type

Exhaust System / Air Intake Assembly / Turbocharger Kit

These additional application notes are supplied by the manufacturer and collated from multiple year ranges. Not all of these notes may apply to every year or every variant. Please contact a StreetFX agent for clarification if required.

• 89% lower backpressure from DPF, 15% lower exhaust exit temp
• Fits trucks with aftermarket airbags see fitment notes section above

Important Notice relating to US Domestic Market Trucks & Pickups

Many US-market trucks and pickups are available in multiple cab and bed-length configurations (e.g., Single Cab, Extended Cab, Double/Crew Cab, CrewMax, 5.5ft/6.5ft/8ft beds, etc.). Exhaust system fitment can vary between these chassis versions.

Where available, we list all compatible vehicles, cab types, and bed lengths in the product description. However, depending on your exact configuration, some systems may require optional extension/mid-pipes or minor modification for correct fitment.

Because of these variations, please carefully check your cab configuration and bed length before purchasing. If you are unsure, or if your vehicle has been modified, please reach out to a StreetFX agent.

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Product Details

Reference Information

Exhaust System, Monster Exhaust, Particulate Filter Back, Steel, Aluminized, Single Exit, Rear, Black Tip, Chevrolet, GMC, 6.6L, Duramax, Kit

Banks Power Monster exhaust systems for gas and diesel vehicles use 100 percent stainless steel constant-diameter tubing to dramatically improve flow, slash backpressure, and lower operating temps. Only Banks offers a truly engineered system. While the other guys may offer a replacement, Banks delivers total enhancement.

Replacing the restrictive stock muffler with a free-flowing Banks Monster muffler makes a huge difference in airflow, sound, and performance. Exhaust flows straight through, instead of torturously winding its way back and forth inside hairpin chambers and building up backpressure. And only Banks Monster mufflers have an expansion chamber to alleviate the nasty drone that other straight-through mufflers are known for. Banks utilizes durable ceramic packing with a high-temperature rating that won't degrade like fiberglass.

For today's trucks equipped with DPFs (diesel particulate filters), there's an additional factor of critical importance: tailpipe exit temperatures. As the DPF cycles, extremely high temperatures are produced and conducted through the exhaust system. Banks' CoolCuff design extinguishes dangerous temperatures better than OE and is just plain cold when stacked up against aftermarket competitors.

Additional features of Banks Monster exhaust systems:
• Mandrel-bent stainless steel construction
• Virtually eliminates backpressure
• Lowers exhaust gas temperatures (EGTs)
• Sound-tested mufflers for a rich, confident note with no drone
• Chrome or high-temperature black over stainless tip options
• Offered in single, single with dual tips, and dual configurations
• Rear and side exits available
• Includes mounting hardware