Performance Diesel Service

03/04/2026

2026 has been off to a busy start. Whether you need fuel system work or oil leaks fixed, or just general maintenance give us a call at 228-218-4451 for your Cummins, Duramax, or Powerstroke needs

12/12/2025

PUBLIC NOTICE ‼️

As many of you have seen or may soon see, a former partner of Performance Diesel Service has been arrested of serious crimes. I want to be fully transparent with our community:

Trey Dubuisson has not been a part of Performance Diesel Service for several months.

I, Ryan Mauffray, am the sole owner of Performance Diesel Service. As a small business, I am proud to be part of the Gulfport community, and I remain committed to serving you with honesty, quality, and integrity.

Performance Diesel is here for all of your diesel needs—from minor and major repairs to diagnostics and full bumper-to-bumper service. My goal is to provide reliable, trustworthy work that keeps our community running strong.

Thank you to everyone who continues to support and trust this small local business. If you have any questions or need to schedule service, please feel free to reach out.

— Ryan Mauffray
Performance Diesel Service

12/02/2025

10% off all S&S dcr and cp3 conversion installs for all of December . Give us a call and let’s get your powerstroke or duramax back on the road without the worry of a cp4 failure. S&S Diesel Motorsport

11/27/2025

We would like wish everybody a Happy Thanksgiving and remind everyone not to let a cp4 failure ruin your holiday plans. Give us a call @ 228-218-4451 for all of your power stroke, duramax, and Cummins needs &SDiesel

07/16/2025

🎆July kicked off busy for us!!🎆

✅Fuel Systems
✅Oil Coolers
✅DCR Conversions
✅Transmissions
✅High Press. Oil Pumps
You name it, we’ve done it this month!

✝️ We’ve been blessed with some awesome help, customers, and those who work behind the scenes (Mrs.Melissa) lol

We are here for all your Powerstroke, Duramax, and Cummins needs!!

Performance Diesel Service
15539 13th. St.
Gulfport, MS 39503
(228)218-4451

06/24/2025

It seems like since Easter we have been 90 to nothing. 🛻 💨

However we’re continually blessed and using what we were given to keep you on the road!✝️

✅Powerstroke/Duramax High pressure fuel pumps

✅DCR Conversions

✅Upper Oil Pan Gaskets

✅Engine Replacements

Performance Diesel Service
(228)218-4451
15539 13th st. Gulfport, MS 39503

04/20/2025

HAPPY EASTER TO ALL OF OUR CUSTOMERS AND FRIENDS!

Happy Easter! He Has Risen!

04/01/2025

Between Mardi Gras, and leading into Easter, we have been SLAMMED!

However, we are always ready and prepared for the next season of blessings! Thank you to all of our customers new and old, for sharing our hard works and dedication to keeping you on the road!

For all of your POWERSTROKE, CUMMINS, and DURAMAX needs!!!

Performance Diesel Service
(228)218-4451
15539 13th st.
Gulfport, MS 39503

CALL, TEXT, or COME BY!

01/31/2025

Something for my “all yall have is fords up here” people lol

We are here for all of your Powerstroke, Duramax, and Cummins needs!!

Performance Diesel Service
15539 13th st.
Gulfport, MS 39503
(228)218-4451

Have a Blessed and Safe weekend!

01/23/2025

We are back to normal operations! We hope everyone has enjoyed the snow, and the time off, if you got any!

Our hours are Mon-Fri 9am-5pm

We are located at 15539 13th st.
Gulfport, MS 39503
Right behind our friends Performance Tire & Wheel, INC. / PTW

We specialize in all of your Powerstroke, Duramax and Cummins needs!

Call, text or come by!
(228)218-4451

Have a Blessed week!, Performance Diesel Service

01/15/2025

2025 is already blessing us with a variety of trucks!

✅Cummins head jobs
✅7.3 fuel tanks/fuel pumps
✅6.4 engines
✅7.3 engines
✅Duramax injectors
✅Duramax fuel systems

We are your Powerstoke, Cummins, and Duramax headquarters!

We strive to provide you with dealer quality service and parts in a timely matter.

We are faith based, honest, providing dealer parts on an honest time line.

Performance Diesel Service
(228)218-4451
15539 13th st. Gulfport, MS 39503