FITMENT
- 2019-2024 6.7L Dodge Ram Cummins 2500 / 3500 Turbo Diesel.
- NOTE: Fits standard Pickup models (Crew Cab Short/Long Bed and Mega Cab).
- Does NOT fit commercial Cab & Chassis (4500/5500) models.
DESCRIPTION
Product Overview
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The stock emissions system behind the downpipe on 2019–2022 Dodge Ram 6.7L Cummins trucks is a major performance barrier. The heavy catalytic converter, DPF, SCR (DEF) unit, and chambered muffler trap extreme thermal energy, trigger frequent regens, and choke exhaust flow.
- The 4" Downpipe-Back DPF & SCR Delete Race Pipe Kit provides this kit eliminates all restrictive mid-pipe and rear emissions components. By relieving backpressure at the source, it lowers towing EGTs, restores instant throttle response, unlocks better fuel economy, and delivers that unmistakable Cummins inline-6 turbo whistle and deep roar.
Key Features
- Premium T409 Stainless Steel: Mandrel-bent 4-inch T409 stainless steel tubing built to withstand high heat, heavy towing vibrations, road salt, and long-term corrosion.
- Maximum Towing EGT Reduction: Removes intense backpressure right behind the downpipe, allowing exhaust gases to exit rapidly to sharply drop Exhaust Gas Temperatures (EGTs) under heavy loads.
- Kill Active Regens & DEF Errors: Permanently eliminates fuel-wasting regeneration cycles and DEF system issues, boosting fuel efficiency (MPG) and preventing crankcase oil dilution.
- Complete Downpipe-Back Airflow: Replaces everything directly behind the OEM downpipe—deleting the restrictive catalytic converter, DPF, SCR (DEF system), and stock muffler.
FAQ
Q: What is the difference between a Downpipe-Back system and a Turbo-Back system?
A: A Downpipe-Back system replaces all exhaust piping and emissions components behind your factory downpipe (retaining your OEM downpipe). A Turbo-Back system replaces the downpipe itself as well, connecting directly to the turbocharger turbine housing outlet.
Q: Does this Downpipe-Back kit retain the factory exhaust brake functionality on 2019–2022 models?
A: Yes, 100%. The factory active exhaust brake on 6.7L Cummins trucks is controlled by the VGT turbocharger nozzle, which sits upstream of the downpipe. Replacing the downpipe-back section does not interfere with exhaust brake operation—in fact, dropping backpressure makes the exhaust brake feel more responsive and crisp.
Q: What should I do with the DEF (Diesel Exhaust Fluid) tank after installing this delete pipe?
A: Once your ECM is flashed with a delete tune, the DEF system is electronically deactivated. You can choose to leave the DEF tank mounted in place empty, or completely remove the tank from the frame to save additional weight and free up underbody space.
Q: Can I easily convert this straight-pipe setup to a muffled setup later if needed?
A: Yes. The system is completely modular. If you ever want to tone down the sound or reduce highway drone, you can unclamp one of the 4" straight mid-sections and install any standard 4" ID/OD performance muffler without replacing the entire exhaust
