5″ Exhaust DPF Delete | GM Duramax Diesel LML 15.5-16

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For OFF-ROAD and RACING Use Only

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For OFF-ROAD and RACING Use Only

5″ downpipe back DPF & CAT delete exhaust system.

Vehicle fitment – 2015.5 & 2016 Chevy / GMC Duramax Diesel LML. Silverado and Sierra pickup trucks. Crew cab short bed & crew cab long bed. This will not fit the 3500/4500/5500 cab & chassis commercial style trucks.

2015 or 2015.5? – 2015 is a split year. The 2011-2015 downpipe is secured to the turbo direct pipe with a v-band style clamp. The 2015.5-2016 uses a 3-bolt flange connection. Be sure to visually verify the clamp style your truck is equipped with.

Exhaust Material – Available in aluminized steel or T-409 stainless steel. Aluminized steel is our most popular material, but will develop surface rust over time. T-409 Stainless Steel. Unlike T-304 stainless steel, it is still magnetic. So if you want to test if you really have stainless steel, you should note that a magnet will still stick to it. We recommend the stainless upgrade if you regularly operate your truck on salted winter roads. Use the drop down menu to make your desired selection.

Installation – Installation takes about 1 hour with simple hand tools on the floor of your driveway or garage. Faster if you have a vehicle lift. Cutting may be required for shorter wheelbase and cab configurations. Brackets, hangers and hardware are included. You may need to reuse some factory parts.

Fuel Economy – Expect a significant improvement in fuel economy. If your DPF is clogged, you’ll probably average about 13-14 mpg. More or less, depending on the severity of the contamination. After removing the DPF/CAT, you can expect a combined mileage of 18-19 mpg. Larger tires and poor driving habits will push the mileage down.

Tuner required – DPF, CAT, SCR and/or DOC removal involves removing and disabling emissions related sensors. A tuner that can clear DPF is required to prevent an engine check engine light or diagnostic trouble codes from being set. If you do not already have a DPF clear tuner, we recommend the EZ Lynk.

Installation Instructions
Flo Pro – 671NM & SS671NM (straight pipes)
Flo Pro – 671 & SS671 with muffler
MBRP / P1 Race Parts – C6049PLM (Straight exhaust)
MBRP / P1 Race Parts – C6049P (with silencer)

*** If stock is not shown but you can still add to cart, the exhaust is made to order and may have up to 3 weeks delivery time. ***

Additional information


Aluminized Steel (Straight Pipe), Aluminized Steel (w/Muffler), Stainless Steel (Straight Pipe), Stainless Steel (w/Muffler)

  • Off-Road Use Advisory: Products available through TheDPFDelete are exclusively intended for off-road applications. They may not adhere to the regulations governing public roadway usage.
  • Local Law Compliance: Customers are advised to verify that the installation and use of these modifications comply with their local and state regulations before proceeding with their purchase.
  • Installation Guidance: For optimal performance and safety, the installation of these components by qualified mechanics is highly recommended. Due to the specialized nature of these parts, they may not include installation instructions and could necessitate slight adjustments or modifications for compatibility with specific vehicles. TheDPFDelete will not accept returns or offer refunds for components not successfully installed due to the absence of instructions.
  • Warranty Notice: Implementing these aftermarket parts will invalidate your vehicle’s warranty. We encourage consulting with your vehicle’s manufacturer prior to the purchase and installation of any parts to understand the potential implications fully.
  • Liability Disclaimer: TheDPFDelete assumes no liability for any issues or damage arising from the installation or use of these parts.
  • Product Representation: The images depicted on our website serve illustrative purposes and may not precisely reflect the current design of the products due to ongoing updates or enhancements made by the manufacturers.
  • Performance Outcome: While these parts are designed to augment your vehicle’s power output, TheDPFDelete does not guarantee specific levels of performance enhancement following their installation.


At TheDPFDelete, we recognize how crucial timely delivery is for our customers who are eager to enhance their vehicles with performance parts. Our commitment to expedited shipping is designed to ensure a smooth and efficient delivery process. We strive to dispatch all orders within two business days, though it’s important to remember that shipping times may occasionally be influenced by external factors.

Estimated Delivery Times

Get ready for a streamlined upgrade experience! Here’s what you can expect:

  • DPF Delete Tuners: Lightning-fast, arriving within just 3-4 days after your purchase to kickstart your performance boost.
  • Delete Pipes and Exhausts: Following closely, delivered in 5-6 days after ordering to enhance your setup.
  • EGR Delete Kits: Right on time, arriving on the 5th day to complete your upgrade.

Please note that these delivery times are estimates and may vary due to unforeseen circumstances. Each item is shipped by a different postal service, ensuring timely arrivals.

Factors Influencing Delivery Timelines:

  • Weather Conditions: Our swift and efficient order processing might be impacted by adverse weather conditions such as rain, snow, or sleet. Rest assured, we’ll make every effort to navigate these challenges and minimize any potential delays.
  • Holiday Schedules: Please note that our shipping center observes holidays and will be closed during these times. Shipping will resume on the next business day. Peak holiday seasons might introduce delays, but we promise to keep you updated and expedite your order’s delivery whenever possible.
  • Staffing Levels: While we pride ourselves on our exceptional team, unforeseen events can sometimes affect our staffing, potentially leading to slight delays. We are committed to quickly addressing these issues to uphold our high service standards.
  • Direct Shipments from Manufacturers: Some exhaust systems and additional items available at our shop may be shipped directly from the manufacturer, which could extend delivery times to 3-6 weeks. We are dedicated to leveraging every available resource to ensure your performance parts reach you as swiftly as possible.

We genuinely appreciate your patience and understanding should we face any unexpected hurdles along the way.

Our Commitment:

Thank you for choosing TheDPFDelete. Our enthusiasm for performance vehicles drives our dedication to providing exceptional customer service, including doing everything in our power to ensure your order arrives on time and as expected. If you have any questions about your order or our shipping policy, please don’t hesitate to reach out. Our team is here to assist and ensure your experience with us is nothing short of excellent.


For Off-Road/Racing Use Only: Products on this online store are for OFF-ROAD and RACE Use Only. They may not be legal on public roads due to emissions laws.

Check Your Local Laws: Before buying or installing, please check your local laws. Using them on public roads сan violate emissions regulations.

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