A delete kit removes emissions control systems from your 2016 Duramax diesel engine
A delete kit is a set of parts that removes or bypasses the emissions control equipment on a 2016 Duramax diesel engine — typically the diesel particulate filter (DPF), exhaust gas recirculation (EGR) system, or both. When you install a delete kit, the engine no longer routes exhaust through these systems, which changes how the engine runs and how it emits.
Owners install delete kits for specific reasons: some want better fuel economy, others want more engine power, and some want to avoid the cost of replacing a failed emissions component. A delete kit does not add horsepower the way a turbo upgrade would, but it can reduce the weight the engine carries and lower the heat it generates during operation.
Before you consider a delete kit, you should understand what it changes about your truck, what it costs, and what legal and practical consequences follow. This guide explains how these kits work, why people use them, and what happens when you install one.
Key Takeaways
- A delete kit removes the DPF, EGR, or both from your 2016 Duramax by replacing factory pipes and sensors with aftermarket versions that bypass the emissions equipment.
- Deleting emissions systems typically improves fuel economy by 2 to 5 miles per gallon and reduces engine heat, but does not significantly increase horsepower on its own.
- Deleting emissions equipment is illegal for on-road use in all 50 states under the Clean Air Act, and you can face fines, failed emissions tests, and difficulty selling the truck.
- A full delete kit (DPF and EGR) costs between $800 and $2,500 in parts, plus $500 to $1,500 in labor if you do not install it yourself.
- Off-road-only use is the legal gray area where some owners operate deleted trucks, though enforcement varies by location and the truck must not be driven on public roads.
How a DPF delete works on a 2016 Duramax
The diesel particulate filter (DPF) is a canister in your exhaust system that traps soot and ash from the diesel combustion process. Over time, the DPF fills up and must be cleaned or replaced — a factory replacement costs $1,500 to $3,000. A DPF delete kit includes a straight pipe that replaces the DPF canister, so exhaust flows directly out without being filtered.
When you delete the DPF, the engine also needs a new tune — a reprogrammed engine control module (ECM) that tells the truck to stop monitoring DPF pressure and stop triggering regeneration cycles (the process where the engine burns off trapped soot). Without the tune, your check engine light will stay on and the truck will run in limp mode.
The kit itself includes the replacement pipe, gaskets, clamps, and sometimes a new exhaust manifold. Installation takes 4 to 8 hours depending on whether you also delete the EGR system and whether you have the truck on a lift.
How an EGR delete works on a 2016 Duramax
The exhaust gas recirculation (EGR) system routes a portion of your exhaust back into the intake manifold to lower combustion temperatures and reduce nitrogen oxide emissions. On a 2016 Duramax, the EGR cooler sits between the exhaust and intake and can fail from carbon buildup or internal corrosion — a factory replacement costs $800 to $1,200.
An EGR delete removes the EGR cooler and replaces it with a blank plate or a straightforward pipe that bypasses the system entirely. Like a DPF delete, an EGR delete requires an ECM tune so the engine stops looking for EGR flow and stops triggering related fault codes.
Many owners delete both systems at once because they address different parts of the emissions system and the labor cost overlaps. A combined DPF and EGR delete is sometimes called a "full delete."
What changes when you delete emissions equipment
Fuel economy typically improves by 2 to 5 miles per gallon after a delete, depending on your driving habits and whether you also tune the engine for power. The improvement comes from the engine no longer working against the restriction of the DPF and no longer burning extra fuel during regeneration cycles. You also eliminate the heat that the EGR cooler generates, which can lower overall engine temperature by 20 to 40 degrees Fahrenheit under load.
Horsepower and torque do not increase significantly from a delete alone — the engine makes the same power it did before. However, a delete is often paired with a power tune that does add horsepower (typically 50 to 100 hp on a stock 2016 Duramax). The delete itself is a prerequisite for that tune because the emissions equipment would interfere with the tuning parameters.
Engine longevity is debated among owners. Removing emissions equipment means less soot in the oil and lower engine temperatures, which some argue extends engine life. However, you also lose the emissions systems' ability to manage combustion byproducts, and you run the engine hotter if you add a power tune. Long-term data on deleted Duramax engines is limited.
The legal status of delete kits in the United States
Deleting emissions equipment is illegal for any vehicle driven on public roads in all 50 states. The Clean Air Act prohibits removing or disabling emissions control systems on vehicles manufactured after 1983, and the EPA enforces this rule. If you are caught driving a deleted truck on a public road, you can face fines up to $37,500 for a first offense, and the truck can fail a state emissions test.
Some states conduct emissions testing at registration renewal, and a deleted truck will fail because the DPF and EGR systems are no longer present. You would need to reinstall the factory equipment or have the truck tested in a state without emissions testing — a solution that is impractical for most owners.
Off-road use exists in a legal gray area. The EPA's rules technically explore only to vehicles driven on public roads, so a deleted truck used exclusively on private land or at a track is not subject to federal enforcement. However, some states have their own rules about off-road emissions, and local law enforcement may still cite you if the truck is operated in violation of state or local ordinances. The burden is on you to know your local rules.
Cost of a delete kit and installation
A DPF delete kit alone costs $800 to $1,500 in parts, depending on the brand and whether it includes a new exhaust manifold. An EGR delete kit costs $400 to $800. A full delete (both systems) runs $1,200 to $2,500 in parts. These prices are for aftermarket kits from manufacturers like MBRP, Flo-Pro, and Weld Racing.
Labor costs vary by shop and region. A DPF delete takes 4 to 6 hours, and an EGR delete takes 2 to 4 hours. At a typical diesel shop rate of $100 to $150 per hour, you can expect $400 to $900 in labor for a DPF delete and $200 to $600 for an EGR delete. A full delete with both systems and an ECM tune typically runs $1,500 to $2,500 in total labor.
If you install the kit yourself, you need basic diesel engine knowledge, a lift or jack stands, and hand tools. Many owners with mechanical experience complete a delete in a weekend. If you are unfamiliar with diesel engines, professional installation is safer and faster.
What to consider before installing a delete kit
Your primary decision is whether the truck will be used only off-road or whether it might ever be driven on public roads. If there is any chance of on-road use, a delete kit creates legal and practical risk: failed emissions tests, fines, and difficulty selling the truck to a buyer who wants a street-legal vehicle.
Consider the cost of reinstalling factory emissions equipment if you later need to pass an inspection or sell the truck. Buying and installing replacement DPF and EGR systems can cost $2,000 to $4,000, which erases much of the savings from avoiding a single component failure.
Think about resale value. A deleted truck appeals to a smaller buyer pool — primarily other off-road enthusiasts — and many buyers avoid deleted trucks because of the legal liability. If you plan to sell the truck within five years, a delete kit may reduce its market value more than it saves you in maintenance costs.
Frequently Asked Questions
Will a delete kit make my 2016 Duramax faster?
A delete kit alone does not add horsepower. However, a delete is often paired with a power tune that adds 50 to 100 hp. The delete is necessary because the emissions equipment would interfere with the tuning parameters. If you want more power, you need both the delete and the tune.
Can I pass an emissions test with a deleted truck?
No. A deleted truck will fail any emissions test that checks for the presence of DPF and EGR systems. If your state requires emissions testing at registration, you cannot register a deleted truck unless you reinstall the factory equipment.
What happens if I get caught driving a deleted truck on the road?
You can face EPA fines up to $37,500 for a first offense. Your truck can also be impounded, and you may be required to reinstall emissions equipment at your own expense. The consequences vary by state and local enforcement.
Is it legal to delete my truck if I only use it off-road?
Federal EPA rules explore only to vehicles driven on public roads, so off-road use is not subject to federal enforcement. However, some states have their own off-road emissions rules, and local law enforcement may cite you depending on where you operate the truck. You are responsible for knowing your local regulations.
How much will I save on fuel with a delete kit?
Most owners report 2 to 5 miles per gallon improvement in fuel economy after a delete. At current diesel prices and typical driving, that translates to $300 to $800 per year in fuel savings, depending on how much you drive. The savings may not offset the cost of the kit and installation for several years.