If you tow heavy, haul daily, or push your Ram HD off-road, you already know the factory DPF is holding your Cummins back. Clogged filters, endless regen cycles, and spiking EGTs aren't just annoying—they're costing you fuel, power, and engine longevity.

The Cavusheo 4" DPF & CAT Delete Pipe is purpose-built for the 2019-2024 Ram 2500 and 3500 with the 6.7L Cummins turbo diesel. This isn't a generic pipe with questionable fitment. It's engineered specifically for the Ram HD chassis, and in this guide, we'll break down exactly why it works, how it installs, and what kind of real-world gains you can expect.

Why Delete the DPF on Your Ram Cummins?

The DPF (Diesel Particulate Filter) traps soot from your exhaust. Good for emissions compliance, terrible for everything else. Here's what happens when you remove it:

These numbers aren't marketing fluff. Lower EGTs mean cooler cylinder temps, less thermal stress on pistons and valves, and a longer engine life. No more regen means no more fuel dumped into your cylinders to burn soot—fuel that dilutes your oil and washes cylinder walls.

What Makes the Cavusheo Delete Pipe Different?

4" Mandrel-Bent Tubing – No Crush Bends, No Restriction

Every bend in this pipe is CNC mandrel-bent. The difference between mandrel bending and crush bending? A mandrel bend maintains constant internal diameter throughout the bend radius. A crush bend pinches down to 50-60% of original diameter at the bend point.

For a turbo diesel, that restriction matters. Exhaust velocity drops. Backpressure increases. EGTs climb. Mandrel bends keep the flow path wide open from turbo outlet to tailpipe.

T409 Stainless Steel – Built for Heat and Corrosion

T409 stainless is the standard for diesel exhaust for a reason. It handles the 1200°F+ temps of a tuned Cummins without warping, and its 11% chromium content provides solid corrosion resistance. This isn't aluminized steel that'll rust through in two winters—it's real stainless, TIG-welded at every joint.

Bolt-On Fitment for Ram 2500/3500

No cutting. No welding. No fabricating hangers. The Cavusheo delete pipe uses the factory mounting points on the Ram 2500 and 3500 chassis. It includes all necessary clamps and gaskets. If you have basic hand tools and a floor jack, you can install this in your driveway.

Fitment covers:

- 2019-2024 Ram 2500 6.7L Cummins

- 2019-2024 Ram 3500 6.7L Cummins

- All cab configurations (Regular, Crew, Mega Cab)

- Both 4WD and 2WD

Installation Overview

Plan for 2-3 hours with basic tools. Here's the high-level workflow:

1. Safety first – Disconnect batteries, let the exhaust cool completely

2. Remove factory exhaust – Unbolt from turbo downpipe back, drop the DPF/CAT assembly

3. Handle sensors carefully – Unplug O2 and temp sensors before dropping the factory pipe; don't let the harness hang by the wires

4. Install Cavusheo pipe – Bolt up from the downpipe flange, align with factory hangers

5. Tighten in sequence – Snug all bolts first, then torque to spec from front to back

6. Double-check clearances – Ensure at least 1/2 inch of clearance from fuel lines, brake lines, and wiring harnesses

One critical note: The factory exhaust on a Ram HD is heavy. The DPF/CAT assembly alone weighs 60-80 lbs. Have a helper or a transmission jack. Don't try to bench-press it out.

Pro Tips for a Clean Install

- Soak the bolts with penetrating oil the night before. The downpipe flange bolts on a Ram HD see extreme heat cycles and have a habit of seizing.

- Label your sensor connectors with masking tape before unplugging them. There are 3-4 sensors on the factory DPF, and they look identical.

- Replace the turbo gasket while you're in there. It's a $12 part and the original is coming off anyway.

- Use anti-seize on all hardware threads. Stainless on stainless galls easily.

Performance Gains You'll Actually Feel

EGT Reduction: 300-400°F Drop

This is the single most important number for diesel longevity. The factory DPF system pushes EGTs to 1100-1300°F during regen—and those temps happen every 100-300 miles whether you like it or not. Sustained high EGTs are what kill head gaskets, crack pistons, and warp exhaust manifolds.

After the delete pipe, expect cruising EGTs in the 600-800°F range and full-throttle peaks around 1000-1100°F. That's a 300-400°F reduction—your engine will thank you with every mile.

Turbo Response

The factory CAT and DPF create significant backpressure between the turbo and the tailpipe. Remove that restriction, and your turbo spools faster, hits peak boost sooner, and holds boost through the RPM range. Throttle response goes from "I pressed the pedal, give it a second" to immediate.

The Sound

Let's be honest—part of deleting a diesel is the sound. The Cavusheo 4" pipe gives your Cummins a deep, throaty tone at idle and a clean, aggressive note under load. It's loud enough to know you deleted it, but not so loud you'll wake the neighborhood. If you want more volume, pair it with the Cavusheo 5" muffler delete.

Common Questions (FAQ)

Q: Will this fit my Ram 3500 dually?

Yes. The pipe clears dual rear wheel setups without modification.

Q: Do I need a tuner with this delete pipe?

To prevent check engine lights and ensure proper engine operation after removing emissions equipment, you'll need an ECM tune that disables DPF/CAT-related DTCs. This pipe is the hardware—the tune is the software.

Q: What's the difference between the 4" and 5" system?

The 4" system replaces the DPF/CAT section only. The 5" system is a complete downpipe-back exhaust. 4" is ideal for towing and daily driving—you get the EGT and response benefits without the full system cost. Go 5" if you're chasing every last horsepower.

Q: How does this affect towing performance?

Positively. Lower EGTs mean you can hold a higher gear longer on grades without the engine pulling timing. The cooler running temps are especially important when towing heavy—your Cummins works hard enough without fighting a plugged DPF.

Q: Does it work with the factory exhaust brake?

Yes. The exhaust brake function operates through the VGT (Variable Geometry Turbo) and is unaffected by the downstream exhaust.

Q: Will my Ram still pass inspection?

DPF/DEF delete modifications will cause an automatic emissions test failure in states that require diesel emissions testing. Check your local regulations before purchasing. This product is sold for off-road use only.

Q: How long does the pipe last?

T409 stainless with TIG welds will last the life of the truck. The natural finish will develop a golden/blue patina after the first few heat cycles—this is cosmetic only and doesn't affect durability.

Q: Can I install this without lifting the truck?

Yes, but you'll want the truck on level ground with the front wheels chocked. A creeper helps. If you have access to a lift, it's a 90-minute job instead of 3 hours.

4" vs 5": Which One for Your Ram?

This is the #1 question we get. Here's the straight answer:

If your Ram is a work truck that tows daily—get the 4". You'll get 90% of the performance benefit at a third of the cost. If it's a dedicated toy or competition truck and you want the full effect—the 5" system is the way to go.

Material & Build Quality at a Glance

- Material: T409 stainless steel

- Diameter: 4" OD, mandrel-bent

- Wall thickness: 16-gauge (0.065")

- Welding: TIG-welded seams, back-purged for clean interior beads

- Flanges: CNC laser-cut, 3/8" thick

- Finish: Natural stainless (will blue/gold with heat cycles—this is normal and expected)

Important Legal Disclaimer

This product is intended for off-road and competition use only. Removing emissions equipment from a vehicle operated on public roads violates federal law under the Clean Air Act. It is the purchaser's responsibility to understand and comply with all applicable local, state, and federal regulations. Cavusheo assumes no liability for improper use.

Ready to Upgrade?

The Cavusheo 4" DPF & CAT Delete Pipe is in stock and ships free to the lower 48. If you're ready to drop EGTs, eliminate regen cycles, and let your Cummins breathe the way it was meant to—this is your pipe.

Shop the Ram 6.7L Cummins DPF Delete Pipe →

*Also check out our 5" Full Exhaust System for Ram Cummins if you're going all-in on performance.*