CUMMINS

Doc’s Diesel Premium RAM Cummins® Replacement Parts: Built to Perform

If you're running a Cummins, you already know it's a workhorse. And here at Doc’s Diesel, we’re all about helping you keep that beast running strong with premium replacement parts that are built to match—or beat—OEM standards. Whether you're wrenching on your daily driver or keeping your work rig in top shape, we've got your back with the parts that get the job done right the first time.

Built to OEM Specs. Backed by the Doc's Fitment Guarantee.

All of our Cummins-compatible parts are designed to deliver OEM fit, function, and reliability. From filter kits and fuel/water separators, everything we carry is tested and trusted by diesel owners who don’t settle for less. And with our Fitment Guarantee, you can wrench with confidence. If it doesn’t fit your rig, we’ll make it right. No guessing. No BS.

Doc’s Makes It Easy to Find The Right Parts

Not sure exactly what your truck needs? Try out our handy Vehicle Selection Tool—just plug in your year, make, and model, and we’ll show you the exact Cummins-compatible parts that match your setup. Simple, fast, and no second-guessing.

Stock Up and Enjoy Free Shipping on All U.S. Orders $99+.

At Doc’s Diesel, we’re not just here to sell you parts—we’re part of the diesel community. Every product we carry is built to last and tested by real diesel owners. Whether you’re new to the Cummins world or a seasoned pro, you’ll find the parts, support, and peace of mind you’re looking for right here. Stocking up? Every order over $99 ships free anywhere in the U.S. That means more cash for mods, fuel, or whatever else your rig needs. Just load up your cart and let us handle the shipping.