MBRP 4-Inch Cat-Back Exhaust Single Side Exit Armor Plus 5.9L Cummins Diesel 2004-2007 Dodge Ram 2500/3500

Free Shipping. Verified fitment for 2004-2007 Dodge Ram 3500; 2004-2007 Dodge Ram 2500. Orders Placed By 1PM CST Get Shipped Same Day. This MBRP cat back is built for buyers who want a direct-fit change in exhaust flow, tone, and durability without gambling on generic universal hardware.

Overview

This exhaust system kit uses a vehicle-specific layout with T409 Stainless Steel, 4.0 inch sizing, and a single outlet configuration. It is well-suited to towing, heavy-load use, and long service intervals where durable tubing and lower restriction matter. This fitment profile ties the part to 5.9 Liter Diesel vehicles, which matters because sound, flow demand, and packaging change with engine and fuel type.

Key Features

• Configuration: Cat Back — defines where the system starts and how much of the factory exhaust it replaces
• Material: T409 Stainless Steel — important for corrosion resistance, heat-cycle durability, and long-term service life
• Tubing Size: 4.0 inch — relevant to flow capacity, sound character, and the balance between response and drivability
• Series: Armor Plus — useful when comparing entry-value construction against longer-life stainless options inside the MBRP range
• Finish: Stainless — matters for surface durability and how the system holds appearance over time
• Outlet: Single — changes rear appearance, exit strategy, and how sound leaves the truck or SUV
• Engine Match: 5.9 Liter Diesel — keeps the part anchored to the intended powertrain instead of a generic application list
• Warranty: Lifetime Warranty — useful for understanding long-term ownership coverage

Engineering Notes

Cat Back changes the exhaust flow path with a platform-specific layout, which is what separates a direct-fit system from a generic pipe solution. On heavy-duty truck platforms, the value is in flow stability under load, corrosion resistance through work-truck use, and a tone profile that remains usable during towing, highway miles, and long service intervals. Cab, bed, and wheelbase differences also matter because they change routing and cabin resonance. T409 Stainless Steel matters in the real world because corrosion resistance determines how well the system survives heat cycles, moisture, road salt, and long service intervals. The 4.0 inch sizing influences gas velocity, sound character, and overall restriction. Bigger is not automatically better; the right balance depends on the application. Within the MBRP range, the Armor Plus designation helps buyers compare construction level, service life, and long-term ownership value.

Important Notes

• Review the installation instructions before ordering to confirm hardware, routing, and whether any cutting or adaptation is required.
• This product includes a California Proposition 65 warning.

Verified Fitment

2004-2007 Dodge Ram 3500; 2004-2007 Dodge Ram 2500