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Jake and the crew are awesome to work with. They can handle anything from routine maintenance or mid to wild one-off builds. The team did a fantastic job customizing my truck. The truck gets compliments everywhere I go and performs equally well. Glad to finally have talent in Rock Hill that can support the truck enthusiast crowd.

- Jeff P.

I had my Rough Country leveling kit put on my 2016 4Runner by the team at State Line Diesel Performance LLC, and the guys did a phenomenal job. Jake & Dawson answered all my questions and took care of my car just a few hours after I dropped it off. I can’t say enough about their professionalism & their knowledge of the business. I couldn’t be happier with the end result, and I plan on using these guys for all my cars’ needs. Top-notch service!

- McCain B.

I was having a fueling issue on my truck, and the guys over here at State Line Diesel Performance LLC did diagnostics and found I had an injector going bad. Their communication was great throughout the whole process. They are very professional and completed the work in a timely manner. Truck runs like a top again. Highly recommend this shop!

- Brock R.

I live in NJ, and I have a F350 dually. I got stuck in South Carolina. I called Jake for the first time, and he fixed my truck. When I left to come back to Jersey, I got stuck again in Virginia. He came the next morning to pick it up – something that I’ve never seen. He got it bullet proofed for me with upgraded parts, and he hooked me up. I drove my truck back with no problem. He is worth every penny I paid for. I highly recommend anyone to go to State Line Diesel Performance LLC.

- Melvin R.

Great shop that only puts out premium service. Recommend them highly for everything from custom suspension to engine performance.

- Daniel S.

I discovered State Line Diesel Performance LLC while out one evening. I stopped by to speak to someone regarding my needs for my dad’s ‘06 Dodge. Jake put together a quote for the repairs. We scheduled a time for the repairs to be completed. The truck was ready as promised. Great experience!

- John C.

Recently had some repairs done at State Line Diesel Performance LLC, and it was a great experience from start to finish. They were highly knowledgeable on the issues I needed fixed, and the customer service and quality of work was great. Very fast turnaround too, which allowed me to get back on the road quickly. Highly recommended!

- Ray E.

Great service!!! Very knowledgeable shop. They actually take pride in their work and have great communication – not like other shops at all. Without a doubt the best diesel shop in the Southeast!!!

- Alex U.

This place has some of the best service and technical resources for customization. I like the complexity of customization offered! Very thorough on what is going to be expected!!!

- Allen V.

This place is the best! By far the best place in the Southeast for custom work and diesel maintenance.

- Gordon W.

Good, honest service and communication. I would highly recommend!

- Matt M.

Only place to take your diesel for work, other than a basic oil change when I am traveling and can’t get home. They are my go-to for all maintenance, parts, etc. Awesome people.

- Paris L.

They build some beautiful trucks!

- Benjamin J.

They diagnosed a very complex injector issue on my 6.7 Power Stroke and got me back on the road quickly. State Line Diesel Performance LLC is definitely the place to go for all of your diesel truck maintenance, repair, upgrades, and custom work.

- Robert O.

On my way back home to Québec city, Canada from Florida, my 2005 Dodge Ram 3500 Cummins 5.9 with the Bigfoot camper on it had engine issues. Contacted State Line Diesel Performance LLC, and the same day, I was in the shop. They ordered fast a new CP3 pump, and one day after, I was back on the road again to Canada. Recommend these guys a lot. They listen to their clients’ needs, and they know how to work on diesels. Excellent job, guys. Thanks again. Merci beaucoup.

- M.

The only place I would ever take my truck! The team is highly qualified and ready to take on any task needed to get your truck up and running again. Had a 2012 Cummins that threw codes for the trans. The boys over at State Line Diesel Performance LLC fixed me up with a bd stage 5, and I had the keys back in my hand in 2 DAYS. Definitely coming back for more upgrades!!

- Dawson E.

Had these guys work on my 2017 Duramax. Jake definitely knows his stuff. Awesome equipment and sweet trucks all over the place in the shop.

- Dylan H.

Great people and great service.

- J. C.

They are some of the nicest guys I have dealt with. They helped me out at the last minute when they didn’t have to. Thank you!

- Amy E.

Highly recommend! These guys are great. ANY diesel you have, they’ve got you covered, even one that has parts that are hard to get. They helped me out a ton! Give them a call for all your diesel needs!

- Ricky B.

Everyone was super friendly and super helpful with great communication, and they never pushed me to go with a product I didn’t want and always advised me to go with what I wanted while telling me they always want the customer to come out on top! Had my truck in and out in 2 days. I couldn’t have asked for a better shop to work on my truck! Highly recommend!

- Jordan M.