Home » 2013-2018 6.7L Dodge Ram Cummins 4" Downpipe back DPF Delete Pipe

2013-2018 6.7L Dodge Ram Cummins 4" Downpipe back DPF Delete Pipe

Compatibility: 2013-2018 Dodge Ram Cummins 6.7L (2500/3500)

Product: 4" Downpipe-Back DPF Delete Pipe System

LEGAL DISCLAIMER & COMPLIANCE

OFF-ROAD USE ONLY: This high-performance racing component is engineered exclusively for competition or sanctioned off-road use. It does not comply with federal or local emissions laws for highway operation. Installation on any vehicle registered for public roads is strictly prohibited. The end-user assumes all legal liability and risk associated with the installation and use of this product.

PHASE 1: DISASSEMBLY & PREPARATION

Step 1: Electrical & Sensor Disconnection Carefully disconnect all EGT (Exhaust Gas Temperature) sensors, pressure sensors, and DEF (Diesel Exhaust Fluid) injector harnesses from the factory downpipe, SCR, and DPF units.

Step 2: Hardware Retrieval Using a flat-head screwdriver, pry the clamps from the three flange positions. Disconnect the cooling lines and retain the factory clips; these are critical components that will be reused during reassembly.

PHASE 2: COMPONENT INSTALLATION

Step 3: Primary Pipe & Hanger Setup

  1. Clamp Positioning: Before connecting any tubing or mufflers, pre-place pipe clamps over all joint connections.

  2. Pipe #1 Installation: Loosely secure the flange to the outlet of the factory downpipe. Install Pipe #1 and insert the integrated hanger into the OEM rubber insulator. Keep the flange bolts finger-tight to allow for alignment.

Step 4: Wheelbase Adaptation (Extension Pipes) Depending on your vehicle’s configuration, install the required extension tube after Pipe #1:

  • MegaCab / Short Bed (SB) Models: Requires #3 Extension Pipe.

  • CrewCab / Long Bed (LB) Models: Requires #4 Extension Pipe.

Step 5: Muffler Delete & Tailpipe Assembly

  1. Install the #2 Muffler Delete Pipe.

  2. Continue with the #5 Over-Axle Pipe and the #6 Tailpipe.

  3. Secure all hangers into the OEM rubber isolators.

    • Note: On certain models, you must migrate two factory rubber insulators from the stock exhaust to the metal hangers located on the truck’s cross beam forward of the rear axle.

PHASE 3: FINAL ALIGNMENT & TORQUE

Step 6: System Calibration & Securing The system should be installed with moderate tension to prevent rattling while allowing for thermal expansion.

  1. Adjust the entire assembly to ensure proper clearance from the chassis and an aesthetically level appearance.

  2. Torque Sequence: Working from the front flange connection toward the rear, tighten all clamps and hardware evenly to ensure a leak-free seal.

TECH TIPS

  • ECM Calibration: This hardware modification requires a compatible Race Tune to disable the factory emissions logic. Failure to update the software will result in "Limp Mode."

  • Heat Cycle: After the first 50 miles, re-inspect and re-torque all clamps to account for material settling and thermal expansion.