aFe Large Bore-HD 5-inch DPF-Back — Ram 6.7L Polished Tip

Five-inch stainless Ram DPF-back with a polished seven-inch tip

The aFe 49-42078-P Large Bore-HD exhaust uses mandrel-bent 409 stainless tubing and one polished stainless clamp-on tip with a riveted logo plate. It mounts behind the retained DPF with factory-style hangers and MIG-welded construction. The exact manufacturer page describes a smooth sound; no selected numerical power or sound test is verified.

Key Features

• Selected aFe part 49-42078-P.
• Five-inch 409 stainless tubing with a seven-inch-outlet polished stainless tip.
• Selected tip has a five-inch inlet and 15-inch nominal length.
• Current exact manufacturer page and selected guide identify 2019–2026 6.7L diesel Ram 2500/3500.
• Mega cab short bed at 160-inch wheelbase uses the supplied extension; crew short bed at 149 inches omits it.
• Direct bolt-on installation without cutting or modifications for documented configurations, according to the manufacturer.
• Band-clamp torque is 40–45 ft-lb; re-tighten all clamps and hardware after 50–100 miles.

Fitment

The exact manufacturer application table identifies 2019–2026 Ram 2500 and 3500 with the 6.7L Cummins diesel. Match Mega Cab/short bed at 160-inch wheelbase or Crew Cab/short bed at 149 inches; the selected guide also calls these Standard “Short” beds. The header prints a foot mark after 149, while its actual procedure and current product page specify inches. No crew long bed, regular cab, chassis cab, gasoline or other wheelbase application is inferred. The named rows below come from the full exact selected retailer table; they are not independent manufacturer approval of every trim/cab configuration. Existing 2019–2020 3500 SLT remains a retailer-positive legacy scope with US-market named-trim approval unverified. The black and polished retailer lists differ, so their extra names are not interchanged.

Specifications

What's Included

• The 49-42078-P kit includes one each stainless front 05-144877, extension 05-144878, rear pipe 05-144879, over-axle 05-244011 and tailpipe 05-244012. The extension is used only for the documented Mega Cab configuration.
• Four five-inch band clamps 05-41173 and one 4.5-inch band clamp 05-410241.
• One polished tip 49T50701-P15. Other finish and aluminized pipe rows in the shared diagram are alternatives, not additional selected contents.
• Factory isolation mounts are retained. No replacement DPF, sensor, muffler, new gasket, intake filter or silicone coupling is established as included.

About aFe Power

aFe Power develops application-specific intake, filtration, exhaust, cooling, tuning, suspension, drivetrain, and truck-performance components supported by product testing and documented installation requirements.

Related Parts

• Exact selected manufacturer application, material and tip information
• Selected May 2026 manufacturer component diagram and 16-step guide
• Exact selected retailer named application table
• Shop the aFe Power collection

FAQ

It is the five-inch 409 stainless Large Bore-HD DPF-back for documented Ram 6.7L diesel pickups, with one polished seven-inch tip and cab-specific extension use behind the retained particulate filter.

Mega Cab short bed with 160-inch wheelbase and Crew Cab short bed with 149-inch wheelbase. The guide also uses Standard “Short” bed wording. Match actual cab, wheelbase and diesel equipment rather than selecting by trim name alone.

Install it with a five-inch band on the 160-inch-wheelbase Mega Cab. Omit it for the 149-inch Crew Cab. No cutting dimension or other wheelbase arrangement is printed for this selection.

No. It installs behind the retained DPF. The exact product page specifies a direct bolt-on installation without cutting or modifications for the documented configurations.

Remove the original exhaust up to the rear of the DPF. Install the front pipe with the 4.5-inch band, add the Mega Cab extension only when applicable, then fit the rear pipe, over-axle pipe, tailpipe and selected tip using the listed bands and factory isolation mounts.

No sensor-removal or battery-disconnection step is printed in the selected 16-step procedure. It also does not direct spare-tire relocation. Do not borrow those procedures from another vehicle’s exhaust.

The exact retailer lists the legacy 2019–2020 3500 SLT application, but US-market named-trim approval was not established. That original scope is retained visibly qualified; no new SLT years or markets are inferred.

Keep joints adjustable until fully assembled, position the tip and align safe clearances. Tighten evenly from front to rear using 40–45 ft-lb for band clamps. Start the vehicle and repair any leak; re-tighten all clamps and hardware after 50–100 miles.

Installation Instructions

1. Confirm aFe 49-42078-P against the exact vehicle and installed equipment. Inventory the actual components and follow the selected manufacturer instructions and current vehicle service requirements.
2. Inspect all components, let the exhaust cool and wear protective equipment. Professional installation is recommended. Support the vehicle at its specified stand locations and separately support the original exhaust; lay out the new parts and leave bands loose for adjustment.
3. Remove the original exhaust up to the rear of the DPF. Install the selected stainless front pipe with the supplied 4.5-inch band. Retain the factory isolation mounts.
4. For Mega Cab/Standard “Short” Bed at 160-inch wheelbase, fit the extension using a five-inch band. For Crew Cab/Standard “Short” Bed at 149 inches, omit the extension. No pipe-cutting dimension is supplied.
5. Install the rear pipe with a five-inch band and place its hangers into factory mounts. Fit the over-axle section with another five-inch band, then the tailpipe with a five-inch band and its hanger in the factory isolation mount.
6. Fit the selected polished tip and adjust its position. Align the full system clear of wires, hoses, brake lines, body and tires. Starting at the front, evenly tighten clamps and fasteners; the guide specifies 40–45 ft-lb for band clamps.
7. Start the vehicle and inspect for leaks. Determine and repair any cause before completing the work and removing the supports. Re-tighten all clamps and hardware after 50–100 miles.

California Proposition 65 warning: this product can expose you to chemicals known to the State of California to cause cancer and reproductive harm.