A 6.7 Cummins delete kit is a full aftermarket upgrade designed for Ram 2500, 3500, and heavy-duty trucks equipped with the 6.7L Cummins diesel engine. These kits are built for off-road and competition use, where removing factory emissions restrictions can help improve airflow, simplify maintenance, and support better engine efficiency.

Modern Cummins engines are powerful from the factory, but emissions systems like EGR, DPF, and DEF can create exhaust restriction and long-term maintenance concerns for performance-focused owners.

What Is a 6.7 Cummins Delete Kit?

A typical 6.7 Cummins delete kit is a complete package that removes or bypasses emissions components and replaces them with high-flow or simplified hardware.

Most full kits include:

• EGR delete plates and cooler bypass parts
• DPF delete exhaust pipe or full turbo-back system
• DEF system bypass components (in full kits)
• CCV reroute system (on many bundles)
• Installation hardware, clamps, and gaskets
• Optional tuning support devices

A complete system ensures all parts work together properly for off-road applications.

Why Use a Delete Kit?

Many diesel enthusiasts install a delete kit to reduce restriction and simplify engine operation in non-road environments.

Key benefits include:

• Improved exhaust flow and reduced backpressure
• Faster turbo spool and better response
• Lower exhaust gas temperatures under load
• Reduced soot and carbon buildup in intake system
• Fewer emissions-related maintenance issues
• More consistent performance in heavy-duty use

These improvements are especially noticeable in towing, hauling, and long-distance driving conditions.

Types of 6.7 Cummins Delete Kits

When choosing a 6.7 Cummins delete kit, there are different configurations depending on performance goals:

EGR Delete Kits

Focus on removing exhaust gas recirculation to improve intake cleanliness and reduce soot buildup.

DPF Delete Kits

Replace restrictive diesel particulate filters with high-flow exhaust systems for better exhaust flow.

Full Delete Bundles

Combine EGR, DPF, DEF, and CCV components into a complete system for maximum simplification and performance potential.

Installation Overview

Installing a delete kit involves replacing multiple factory systems with aftermarket components.

Basic installation steps:

1. Disconnect batteries for safety
2. Remove EGR, DPF, and related emissions components
3. Install block-off plates and replacement piping
4. Fit exhaust system sections securely
5. Tighten all clamps and hardware
6. Inspect for leaks or misalignment

Because modern Cummins engines are complex, professional installation is often recommended for best results.

What to Look for in a Kit

Before purchasing a 6.7 Cummins delete kit, quality and compatibility are critical.

Look for:

• Vehicle-specific fitment (year-matched kits)
• Stainless steel or CNC-machined construction
• Complete hardware and gasket sets
• Direct bolt-on design
• Corrosion-resistant materials
• Clear installation support or instructions

A well-built kit reduces installation problems and improves long-term reliability.

Important Considerations

Before installing a delete kit, keep in mind:

• Intended for off-road or competition use only
• Proper tuning is often required for correct operation
• Installation quality directly affects performance and durability
• Incorrect kit selection can cause fitment issues
• Local emissions laws must always be followed

A 6.7 Cummins delete kit is a popular upgrade for diesel enthusiasts looking to improve airflow, reduce restrictions, and simplify engine systems in off-road applications. When paired with proper installation and quality components, it can enhance throttle response, reduce maintenance needs, and support stronger long-term performance in demanding driving conditions.