Unlock Your 6.7L Cummins Potential: The Ultimate Guide to DPF Delete Pipes

If you drive a Dodge Ram with a 6.7L Cummins, you might feel like your truck is being held back. That’s because the factory emissions control system—specifically a part called the DPF (Diesel Particulate Filter)—clogs up your exhaust. A DPF delete is the most effective way to fix this problem and unlock your engine's true power.

A DPF delete pipe simply replaces the restrictive factory filter with a straight piece of pipe. This lets your engine breathe out exhaust gases easily, which solves a bunch of common issues.

What’s Wrong with the Factory DPF on Cummins 6.7L engine?

The stock DPF is like trying to breathe through a stuffy nose. It causes exhaust backpressure—a buildup of gases that can’t get out fast enough. This causes:

• Turbo Lag: Your turbocharger (which uses exhaust gas to make power) spins slower, so it takes longer to spool up when you step on the gas.
• Poor Fuel Economy: Your engine works harder to push exhaust out, burning more diesel.
• High EGTs: Exhaust Gas Temperatures get dangerously hot, especially when towing, which can damage engine parts.
• Costly Repairs: The DPF gets clogged and requires expensive cleaning or replacement.

Installing a delete pipe removes this restriction. It’s the first and most important step to getting better performance, improved fuel efficiency and a healthier engine.

Types of Cummins Delete Kits: Which One is Right for Your Truck?

We offer different kits based on your truck's year and how you use it. The main difference is how much of the factory exhaust you replace.

1. Downpipe-Back Delete Pipe

This is the most popular kit. It replaces the exhaust from the DPF to the tailpipe, leaving the front section (downpipe) in place. It’s a great balance of performance and value.

➤ 2007.5-2012 Ram Cummins 6.7L Cat & DPF Delete Pipe

➤ 2011-2012 Ram Cummins 6.7L Cab & Chassis DPF Delete Pipe

➤ 2011-2012 Ram Cummins 6.7L Cab & Chassis 4" SCR Urea Race Pipe Over 70"

➤ 2011-2012 Ram Cummins 6.7L Cab & Chassis 4" SCR Urea Race Pipe Under 70"

➤ 2013-2018  Ram Cummins 6.7L Cat & DPF Delete Pipe

➤ 2013-2021 Ram 6.7L Cab & Chassis Stainless Steel Cat & DPF Delete Pipe

➤ 2016-2018 Nissan Cummins 5.0L DPF Delete Pipe

➤ 2019-2024 Ram Cummins 6.7L Cat & DPF Delete Pipe

2. Turbo-Back Delete Exhaust System

This is the complete kit for maximum power. It replaces everything from the turbocharger all the way to the back of the truck. This is the best choice if you’re adding a custom tune.

➤ 2007.5-2012 Ram Cummins 6.7L Turbo Back Race Exhaust

➤ 2013-2018 Ram Cummins 6.7L 5 inch Turbo Back Race Exhaust

➤ 2016-2018 Nissan Cummins 5.0L Race Exhaust Muffler/No Muffler

3. Down-pipe Back Delete Exhaust System

This is a turbo-back system with no muffler. It provides the loudest sound and absolute maximum airflow. It’s often paired with a larger 5-inch exhaust pipe.

➤ 2013-2018 Ram Cummins 6.7L 4 inch Down-pipe Back Race Exhaust

➤ 2019-2024 Ram Cummins 6.7L Down-pipe Back Exhaust System | 4 inch/ 5 inch options

What Kind of Results Can You Expect?

Here’s what most guys see after installing a delete kit and a tuner:

• More Horsepower: Gains of 30-50+ HP are common. The truck feels stronger and accelerates faster.
• Better Fuel Mileage: Most people report 2-4 more MPG. That means more miles between fill-ups.
• Lower EGTs: Exhaust Gas Temperatures drop by 150°–200°F, which is crucial for safe towing.
• Better Throttle Response: The turbo spools up instantly, with no more lag.
• Deeper Exhaust Sound: Your truck will sound like a powerful diesel should. If you want it quieter, choose a kit with a muffler.

Ultimate Power Package: Your All-in-One Delete Solution

Stop piecing your build together! For the most powerful and reliable results, your truck needs a complete solution where every part is designed to work in perfect harmony.

Get a Complete Kit: DPF Delete Pipe/ Exhaust + EGR Delete combo + Tuner with custom calibrated tune files for your vehicle.

Why: 

• Hardware & Software in Sync: The delete pipe removes the physical restriction, the EGR delete kit stops sooty exhaust gas from recirculating into your engine, and the custom-calibrated tuner tells your truck's computer to optimize everything for peak performance.
• No Check Engine Lights: When all components are installed and tuned together, your ECU operates smoothly without throwing codes or entering limp mode.
• Maximize Your Gains: This combo is how you achieve the full potential of your delete—+50+ HP, +4+ MPG, and drastically reduced EGTs—all at once.

The Bottom Line

A DPF delete is the single best modification for your 6.7L Cummins. It fixes the design flaws of the factory emissions system, giving you more power, better fuel economy and a longer-lasting engine.

Important Note: These kits are for off-road and competition use only. Always check your local and federal laws regarding emissions equipment before modifying your truck.