Install a 4" DPF Turbo-Back Pipe on your 2010-2012 Dodge Ram 6.7 Cummins for better exhaust flow & performance. Step-by-step guide, tools, tuning tips & legal info.
Legal Disclaimer
This product is intended for off-road use only. Removing the DPF may violate emissions regulations in certain states. Please check local laws before proceeding.
Tools & Equipment Needed
✅ Basic Tools:
· Socket set (metric & standard)
· Ratchet and extensions
· Flathead screwdriver
· Torque wrench
· Penetrating oil (e.g., PB Blaster)
✅ Cutting Tools (If Needed):
· Sawzall or hacksaw
· Cutting wheel (optional)
✅ Safety Gear:
· Safety glasses
· Mechanic gloves
· Jack stands (if extra clearance is needed)
Step-by-Step Installation Guide
Step 1: Remove the Stock System
1. Locate the band clamp that secures the downpipe to the turbo.
2. Loosen the clamp bolt enough to unlatch it.
3. Use a flathead screwdriver to pry the clamp away from the flange at three different spots.
4. Remove the clamp but keep it for reuse with the new system.
Step 2: Unbolt Factory Components
1. Unbolt the flange connections, factory bungs, and airlines attached to the downpipe and Diesel Particulate Filter (DPF).
2. Set aside any reusable clamps or bolts.
Step 3: Cutting the Downpipe (Optional for Easier Removal)
1. To ease removal, cut the downpipe next to the transmission using a sawzall or hacksaw.
2. If you plan to keep the downpipe intact, you’ll need to lower the transmission plate support for clearance.
o ⚠️ Before cutting, check the surrounding area for any wires, fuel lines, or sensors to avoid accidental damage.
Step 4: Remove the Factory Exhaust System
1. Loosen all clamps securing the factory exhaust.
2. Spray WD-40 on the rubber hangers to make removal easier.
3. Pry the exhaust from the OEM rubber hangers and remove the entire system.
Step 5: Install the Turbo Pipe (#20811)
1. Before installation, place clamps loosely over all connection points.
2. Connect turbo pipe (#20811) to the turbo using the stock turbo band clamp.
3. Snug the clamp to hold the pipe in place, but leave it loose enough to allow adjustments.
Step 6: Install the DPF Race Pipe (#21012NB)
1. If your truck has a longer wheelbase, install the extension pipe (#40022) as needed.
2. Ensure the race pipe is fully inserted into the turbo pipe before tightening clamps.
3. Sensors and airlines do not need to be reinstalled into the new exhaust system.
4. Follow your tuner’s instructions to ensure compatibility with the exhaust setup.
Step 7: Install the Muffler, Over-Axle Pipe & Tailpipe
1. Install the muffler first, followed by the over-axle pipe and tailpipe.
2. Insert the hangers into the OEM rubber hangers for secure placement.
Step 8: Adjust & Check Clearance
1. Snug all clamps so they hold the pipes but still allow movement for final positioning.
2. Check for clearance:
o Ensure brake lines, e-brake cables, and axle vent tubes are free from contact.
o Verify the tailpipe exit is level with the truck.
Step 9: Transfer the EGT Sensor (If Applicable)
1. Use the supplied security torx tool to remove the EGT sensor from the factory exhaust.
2. Install the sensor into the new exhaust system (if required) and hand-tighten the support.
Step 10: Final Tightening & Welding
1. Tighten the turbo band clamp securely.
2. Start from the front clamp and work toward the rear, tightening all connections.
3. Torque Specs:
o Turbo Band Clamp: ~15-20 ft-lbs
o Exhaust Clamps: 40-50 ft-lbs
4. For added security, weld only the pipe-to-pipe connections, avoiding direct welding on clamps.
Final Checks
✅ Double-check all clamps and bolts for tightness.
✅ Start the truck and listen for leaks. If you hear any exhaust leaks, adjust and retighten clamps.
✅ Take a short test drive to ensure proper fitment and performance.
ECU Tuning & Performance Impact
�� ECU Tuning Required: After installing a DPF delete system, your truck’s ECU must be tuned to disable the DPF system and prevent CEL errors. Check out our recommended Cummins DPF delete tuners for optimal performance.
�� Exhaust Sound: Expect a louder, deeper tone with improved turbo spool.
⛽ Fuel Economy: Removing the DPF may lead to a 1-3 MPG improvement, depending on driving habits and tuning.
Conclusion
By following this guide, you’ll successfully install a 4" DPF Turbo-Back Pipe on your 2010-2012 Dodge Ram 6.7 Cummins, improving exhaust flow and engine efficiency. For optimal results, pair this upgrade with a tuner designed for DPF-delete setups.
Need help selecting the right parts? Check out our top-rated DPF delete kits at SPETUNER!
