Who we are
Built on Diesel
We don't tune trucks. We don't do oil changes. We build engines — long blocks and drop-ins for Cummins and Power Stroke — and we've been doing it long enough to know the difference between an engine that runs and one that lasts. We offer a 3 year, unlimited mile warranty on ALL of our engines. No questions asked, it breaks, we take care of it!
The Shilner Story
Shilner Diesel was built around one thing: diesel engine assembly done right. We specialize exclusively in long block and drop-in replacement engines for Cummins and Power Stroke platforms — the engines that power the trucks that work for a living.
Every engine we build goes through the same process. Quality components, assembled to spec, tested before it ships. No shortcuts. No guesswork. When your engine arrives, it's ready to install and ready to run.
We sell to shops and direct to truck owners nationwide. Whether you're a diesel shop looking for a reliable long block supplier or a truck owner who needs a long block or complete drop-in, we build the engine you need.
Why Shilner
Specialists, Not Generalists
We build Cummins and Power Stroke engines. That's it. No distractions, no upsells — just deep expertise in the platforms we know best.
Long Block & Drop-In
Two options, built to the same standard. Long blocks for those that want to finish the job their way. Drop-ins for owners who want to bolt it in and go.
Built to OEM Spec
Every engine is assembled to OEM specifications with quality components. We don't cut corners on parts and we don't skip steps in the build process.
Tested Before It Ships
Your engine is tested before it leaves our facility. When it arrives, you're not guessing — you know it's ready.
Nationwide
We ship long blocks and drop-in engines to shops and truck owners across the country. Wherever your truck is, we can get you an engine.
Straight Talk
Call us and you'll talk to someone who knows diesel engines. We'll tell you what you need, what it costs, and when it ships. No runaround.
Ready to order an engine?
Call us and we'll get you the right build for your truck.