Dodge R400 Parts & Accessories

Dodge R400 Parts & Accessories

The Dodge R400 is a medium-duty forward-control commercial truck platform that shares its core architecture with the full D-series and W-series lineups. Built for work and capable of serious mileage, R400 owners upgrading their rigs come looking for parts that restore reliability, improve towing capacity, and extend the life of a proven platform. Whether you run one of these commercially or use it as a heavy hauler, the right parts make a measurable difference in performance and longevity.

Popular Upgrades

The most commonly sourced parts for the R400 include heavy-duty exhaust components, replacement intake manifolds, carburetor rebuild kits, and upgraded braking hardware. Leaf spring packs and heavy-duty shock absorbers are perennial favorites for owners dealing with load-bearing wear. Cooling system components including radiators, thermostats, and hoses also move quickly, as the R400 platform sees real work conditions that tax the stock cooling setup under sustained load.

Performance & Handling

The R400 was available with the 318 LA V8 and the 360 LA V8, both reliable small-block engines with strong aftermarket support. The 360 in particular responds well to intake and exhaust upgrades, and there is a wide selection of cam profiles and carburetor options suited to this displacement. For chassis work, the medium-duty leaf spring front and rear suspension benefits from quality replacement hardware to maintain proper ride height and payload capacity under load.

What exhaust options fit the Dodge R400?

The R400 uses a standard LA V8 exhaust bolt pattern on the 318 and 360, making it compatible with a wide range of aftermarket headers and mid-pipes. Cat-back exhaust sections designed for the D-series trucks typically adapt well to the R400 frame. Confirm your cab configuration and engine before ordering to ensure proper fitment.

Are suspension parts for the R400 still available?

Yes, leaf spring packs, U-bolts, and shock absorbers for the R400 platform remain available through the commercial truck parts market. Many components overlap with the D300 and D400 series, broadening your sourcing options. Heavy-duty replacement springs are particularly important if the truck has been used for towing or hauling at or near rated capacity for extended periods.

Black Ops Auto Works stocks a full range of parts for Dodge commercial truck platforms. Browse related categories including exhaust systems, suspension components, and air intake systems to find everything your R400 needs.