English
0 item(s)
View cart
You have no items in your shopping cart.
Built For Boost · Diesel Performance Specialists
Cummins, Powerstroke & Duramax Performance Parts
Shop hand-picked diesel performance parts from the industry's top brands — backed by expert fitment help and fast shipping.
- Free shipping over $99
- Same-day dispatch on in-stock parts
- Fitment help from real diesel techs
Secure Checkout
Encrypted, PCI-compliant payments
Genuine Brand-Name Parts
No knock-offs, ever
Price-Match Promise
Found it cheaper? Just ask
Authorized Dealer
For the brands we carry
Find Your Fit
Shop By Platform
Performance parts dialed in for your engine — pick your platform and get the right components the first time.
Hand-Picked
DNR Picks
By The Numbers
Diesel Done Right
14+
Brands We Carry
9100+
Orders Shipped
18+
Years of Diesel Know-How
4.8★
Average Rating
Trusted Brands We Carry
Only the industry leaders in diesel performance.
Picked For You
Trending With Diesel Owners
Why DNR Customs
Proven Diesel Performance
DNR Customs is your one-stop shop for Powerstroke, Duramax, and Cummins diesel performance parts. We work only with the industry's leading brands to help you repair, upgrade and protect your diesel engine.
Whether you're chasing more horsepower, stronger towing, or a dependable daily driver, our team helps you choose parts that actually work together — and our certified diesel mechanics can install and tune them for you.
Need a Hand?
Not Sure What You Need?
Our diesel techs will spec the right parts for your truck, your goals and your budget — no guesswork.
Questions, Answered
Diesel Parts FAQ
Everything you need to know before you order.
How do I know a part fits my truck?
Every listing notes compatible engines and model years. Not sure? Message our diesel techs with your year, make, model and engine and we'll confirm fitment before you buy.
How fast do orders ship?
In-stock parts ship the same business day on orders placed before our daily cutoff, with free shipping on orders over $99.
What is your return policy?
Unused parts in original packaging can be returned within 30 days. Reach out and we'll get an RMA started for you.
Can you help me build a complete setup?
Absolutely. Our team builds Cummins, Powerstroke and Duramax combos every day. Request a quote and we'll spec the right parts for your goals and budget.
Do you install parts?
Yes — our certified diesel mechanics can install and tune what you order. Ask about shop services when you reach out.
What Customers Say
Rated By Diesel Owners
Real feedback from drivers running our parts.
Exactly the right part, shipped fast. My truck has never run better.
Knowledgeable team helped me pick the right turbo — huge gains.
Great prices and fitment was spot on. Will buy again.
From The Garage
Diesel Tech & Tips
Jun 23, 2026Edge CTS3: The Diesel Tuner + Monitor That Actually Earned ItWhat the Edge CTS3 actually does — Evolution vs Insight, monitor PIDs, integrated tuning, platform coverage, and which version you really want.Read article
Jun 18, 2026BD Diesel: From Bulletproof Exhaust Manifolds to Built TransmissionsBD Diesel's whole catalog is built around durability — cracked-manifold replacements, ARP head studs, built 68RFE and Allison transmissions, heavy-duty steering. Here's...Read article
Jun 16, 2026Banks Power: Monster Ram, Ram Air & The Diesel Aftermarket OGBanks Power earned its reputation by engineering — Monster Ram, Ram Air, Derringer, iDash, Monster Exhaust. Here's the no-fluff guide to the...Read article
About DNR Customs
Diesel Performance Parts for Cummins, Powerstroke & Duramax
DNR Customs is a diesel performance shop built by diesel people. We stock and ship the parts that make Cummins, Powerstroke and Duramax trucks run harder, tow heavier and last longer — from fuel systems and turbos to transmissions, intakes and tuning. Every part we sell is one we'd bolt onto our own trucks.
Read more Show less
Cummins Performance Parts
From the 5.9L 12-valve and 24-valve to the 6.7L, we carry the fueling, airflow and tuning upgrades that wake a Cummins up — CP3 conversions, injectors, lift pumps, intake elbows, turbos and built transmissions. Shop Cummins parts.
Powerstroke Performance Parts
We cover the 7.3L, 6.0L, 6.4L and 6.7L Powerstroke platforms with EGR and oil-system solutions, head studs, turbos, intakes and tuners that fix the weak points and add real power. Shop Powerstroke parts.
Duramax Performance Parts
For LB7 through L5P Duramax trucks we stock CP4 and lift-pump upgrades, injectors, turbos, intakes and Allison transmission components to keep your GM diesel reliable while it makes more power. Shop Duramax parts.
Service, Install & Custom Builds
Not sure where to start? Our certified diesel mechanics build, install and tune complete setups every day. Tell us your truck and your goals and we'll spec the right combination for your budget. Request a quote to get started.
