2019+ 6.7L Cummins DPF Delete Race Pipe Installation Guide

1. Introduction

Overview

This guide provides step-by-step instructions for installing the DPF Delete Race Pipe on a 2019+ RAM 2500/3500 equipped with the 6.7L Cummins engine. By removing the factory diesel particulate filter (DPF), this modification improves exhaust flow, reduces exhaust gas temperatures (EGTs), and enhances throttle response. However, removing the DPF may void your vehicle's warranty and is subject to emissions regulations. Ensure compliance with local laws before proceeding. Note: This modification is intended for off-road or race use only. Ensure compliance with local emissions laws before proceeding.

Vehicle Compatibility

· 2019+ RAM 2500/3500 with 6.7L Cummins Engine

· Designed for downpipe-back installation

Installation Difficulty

· Skill Level: Moderate (basic mechanical knowledge required, including familiarity with exhaust systems, clamp installations, and proper torque application).

· Estimated Time: 2-3 hours

2. Pre-Installation Preparation

2.1 Required Tools

· 13mm, 15mm, and 17mm wrenches

· Torque wrench (45-50 ft-lbs recommended)

· WD-40 or similar lubricant

· Jack and jack stands

· Safety gloves and goggles

2.2 Parts Checklist

Ensure you have the following parts before beginning the installation:
✅ Race Pipe (#21958)
✅ Axle Pipe (#21959)
✅ Tailpipe (#21960)
✅ Muffler replacement pipe (#50230)
✅ V-band clamp & extension pipe (if applicable)
✅ Factory gasket (retain for reuse)

3. DPF Removal & Installation of the Race Pipe

3.1 Removing the Factory DPF System

Step 1: Remove the six factory sensors from the exhaust system and disconnect any electrical connections to safely detach the factory exhaust components.

Step 2: Starting from the rear of the truck, loosen the clamp securing the axle/tailpipe assembly to the filter. Remove the assembly from the rubber isolators on the frame. Tip: Apply WD-40 or similar lubricant to ease hanger removal.

Step 3: Remove the four nuts securing the rear canister to the front section. Caution: This part is heavy, so use a second person or a stand for support.

Step 4: Detach the factory hanger bracket near the flange to make removing the next canister easier.

Step 5: Move to the front canister where it connects to the downpipe. Loosen the nut on the V-band clamp, then remove the clamp to detach the canister. Retain the factory gasket for reuse.

3.2 Installing the Race Pipe System

Step 6: Slide the front Race Pipe (#21958) over the two cross-members and connect it to the downpipe using the factory clamp and gasket. Ensure the hanger is correctly seated in the rubber isolator. Tighten the connection just enough to hold the pipe in place but allow for slight adjustments if necessary.

Step 7: Install the Axle Pipe (#21959) and Tailpipe (#21960), making sure all pipes are properly engaged in their respective hangers and securely fitted into one another.

Step 8: Using a stand for support, install the muffler replacement pipe (#50230) onto the axle pipe. Measure the gap between the muffler and front Race Pipe (#21958) to determine the required extension pipe length. Trim the extension pipe if necessary, ensuring that only the non-expanded end is cut.

3.3 Adjustments & Final Tightening

Step 9: Once all components are in place, double-check the alignment. Make any necessary adjustments before tightening all clamps, starting from the downpipe and working towards the rear of the truck. Torque clamps to 45-50 ft-lbs using a high-quality torque wrench, such as a Snap-on or Tekton model, to ensure proper tightening.

Step 10: (Optional) To enhance security, apply a small MIG weld under each clamp to the clamped pipe connections. Do not weld the clamps themselves, as this may cause structural damage or make future adjustments difficult.

4. Final Inspection & Testing

4.1 Post-Installation Checks

✅ Start the engine and inspect for any exhaust leaks.
✅ Ensure that the Race Pipe does not contact the chassis, suspension, or other components.
✅ Take the truck for a short test drive, then recheck all bolts and clamps for tightness.

5. Frequently Asked Questions

Q: Why is there a metallic rattling sound after installation?
A: This may be due to improper pipe alignment. Double-check that all hangers are properly secured and that there is adequate clearance from the chassis.

Q: Can the Race Pipe be installed as a direct replacement for the factory DPF?
A: Yes, the Race Pipe is designed to fit with the factory downpipe using the original V-band clamp and gasket.

Q: Do I need ECU tuning after installing the Race Pipe?
A: Yes, tuning is recommended to avoid check engine lights (CEL) and optimize performance.

6. Maintenance & Care Tips

· Regular Inspections: Check clamps and bolts every 5,000 miles to ensure they remain tight. In high-humidity areas, inspect for rust or corrosion and address any signs of wear accordingly.

· Cleaning: Keep the exhaust system free from excessive dirt and debris. If necessary, apply high-temperature corrosion-resistant coating.

· Storage Considerations: If the truck is not used for an extended period, inspect the pipe connections for rust or looseness before operation.

By following these detailed steps, you can successfully install the DPF Delete Race Pipe on your 2019+ 6.7L Cummins truck, improving exhaust flow and overall performance.