6.7L Cummins 4" DPF & Cat Delete Race Pipe Straight Pipe for 2019-2024 Dodge Ram 2500/3500

6.7L Cummins 4" DPF & Cat Delete Race Pipe for 2019-2024

This 6.7L Cummins 4" DPF & Cat Delete Race Pipe is designed for 2019-2024 Dodge Ram 2500 and 3500 trucks equipped with the 6.7L Cummins diesel engine. It replaces the most drag-prone mid-section exhaust components in the original exhaust system—the DPF and catalytic converter—with a simpler, more direct 4-inch straight-through exhaust pipe. This is a practical choice for owners who want a smoother exhaust path, better load response, and a solid foundation for future tuning or performance upgrades.

Compatibility Information

Compatible Models:

• 2019-2024 Dodge Ram 2500 / 3500 Pickup
• Suspension: Fits all factory suspension setups
• Air-Ride Note: Compatible with air suspension models

Not Compatible With:

• Cab & Chassis models

Before ordering, please use the vehicle fitment checker on our product page to confirm your exact year, model, cab style, and chassis configuration. This helps reduce ordering errors and ensures the best possible fitment match for your truck.

Optimizing Vehicle Performance from the Source of Resistance

The original DPF and catalytic converter components create continuous resistance in the exhaust system. This resistance leads to three common performance drawbacks:

• Higher exhaust back pressure, increasing pumping losses;
• Increased pressure behind the turbocharger, reducing turbo responsiveness;
• Increased heat retention, leading to higher exhaust temperatures.

Removing the DPF and catalytic converter through a 4-inch straight-through exhaust pipe can help

• Reduce exhaust back pressure by over 60%,
• Improve turbo and throttle response by approximately 20-30%,
• Reduce exhaust temperature by approximately 100-150°F under heavy traction or sustained uphill driving conditions.

In real-world driving, this typically translates to more powerful trucks, smoother ride under load, and more responsive throttle.

Furthermore, the original DPF system requires periodic regeneration, typically every 200-500 miles (approximately 320-800 km), depending on usage. Removing the DPF eliminates the regeneration cycle, thereby reducing DPF-related fuel consumption, heat buildup, and maintenance burden.

2mm Thickness + T409 Stainless Steel

This product is not your average thin-walled replacement tubing:

• Thickness: 2mm, more robust, better resistant to daily vibrations and long-term use.
• Material: T-409 stainless steel, more heat-resistant. More corrosion-resistant than the original aluminized tubing.

How to Choose: Race Pipe vs. Downpipe-Back Exhaust vs. Turbo-Back Exhaust

1. Race Pipe

A race pipe typically replaces the most restrictive section of the stock exhaust system, usually the DPF + CAT section.

Its characteristics are:

• It only addresses the core restrictive section.
• It's relatively cheaper.
• The key is to clear the "most congested part" first.

2. Downpipe-Back Exhaust

A downpipe-back exhaust is a larger upgrade, starting from the rear of the downpipe and extending to the tailpipe. It replaces more than a race pipe, typically involving: the mid-pipe, muffler (depending on the configuration), and tailpipe.

• Its characteristics are:
• A larger upgrade range than a race pipe.
• A more complete increase in exhaust flow.
• A more noticeable change in sound.

More suitable for users who are no longer satisfied with simply replacing the restrictive section.

3. Turbo-Back Exhaust

A Turbo-Back Exhaust is a complete replacement, starting from the rear of the turbocharger and extending to the tailpipe. This is the type of exhaust system upgrade with the widest range.

Its characteristics are:

• Widest replacement range
• Most thorough reduction in exhaust resistance
• Greatest potential for airflow
• Most noticeable improvement in sound and overall modification feel

Three-way Core Comparison Table

The simplest selection options:

• Race Pipe: Addresses the most critical limitations first, suitable for beginners.
• Downpipe-Back Exhaust: Offers a wider upgrade range, suitable for those who want a more complete exhaust system.
• Turbo-Back Exhaust: Provides the most thorough upgrade, suitable for those seeking maximum flow and advanced modifications.

How to Choose: With Muffler vs. Without Muffler

If your primary concern is the difference in sound, this section is crucial.

1. With Muffler

The version with a muffler prioritizes sound control over performance. Sound characteristics typically include:

• Lower pitch than the stock version
• Quieter than a straight-through exhaust
• Less noise on long drives

Better for daily driving, long-distance touring, highway driving, and towing.

Its design focus is: Maintaining better auditory comfort while improving performance.

2. Without Muffler

The version without a muffler has a more direct, raw, and impactful sound. Sound characteristics typically include:

• Louder volume
• More direct
• Rougher and more aggressive
• More pronounced diesel engine exhaust note

Its design focus is: Maximizing the exhaust note for a more intense tuning experience.

Comparison Table

Recommended Selection:

• If your primary driving scenarios are track racing, off-roading, or seeking the most direct performance feedback → Choose the Race Pipe without a muffler.
• If you need to balance daily commuting and long-distance driving, and want to improve performance without compromising comfort → Choose the Race Pipe with a muffler.