Unleash the full power and potential of your diesel vehicle with the right upgrades.

If you’re serious about getting more from your diesel truck or car, performance upgrades are the way to go. At State Line Diesel Performance LLC, we specialize in helping diesel vehicle owners throughout Charlotte, North Carolina enhance power and reliability with proven performance solutions. Whether you need to upgrade your fleet or are just looking to improve your everyday ride, our team has the tools and experience to take your vehicle to the next level.

Vehicle Performance Upgrades in Charlotte, North Carolina

We offer a wide range of vehicle performance upgrades tailored to meet your specific needs. Every component we install is chosen for its quality, compatibility, and ability to boost performance safely. We’ll take the time to assess your needs and offer the right parts for the job. Our technicians work with precision and care to ensure your vehicle not only runs harder but also smarter.

"They get the job done right the first time!”

“Professional, Knowledgeable, and Friendly!!! They get the job done right the first time and at a reasonable price. Thanks Guys!!”

★★★★★ 22^th August 2018 —Gordon & Dani H.

Ready to Unlock More Power & Capability for Your Truck? Schedule Your Custom Upgrade Consultation!

Enjoy Your Vehicle to Its Fullest Potential

Services We Offer

Vehicle Customization

Vehicle customization can take your truck to the next level.

Truck Maintenance & Repair

We also have state-of-the-art equipment and the knowledge to use that equipment to quickly recognize and diagnose your truck’s needs.

Wheels & Tires

We offer a wide range of wheels & tires to help your truck function as it should.

Maximize Your Diesel's Horsepower & Fuel Economy—Call or Text (803) 930-9069 Today!

Enjoy Your Vehicle to Its Fullest Potential

Improve the Performance of Your Fleet or Truck with the Help of Our Team!

Upgrading your diesel vehicle isn’t just about speed or power. It’s about getting better fuel economy, smoother drivability, and longer engine life. Our team can help you pinpoint the right vehicle performance upgrades for your goals, whether you’re looking for more torque, improved towing capacity, or just a more responsive feel on the road. We take pride in delivering results that are measurable and built to last.

We understand diesel systems inside and out. We work with top-tier parts and trusted brands to give your vehicle a serious edge. Our commitment to craftsmanship and customer service sets us apart as a trusted source for vehicle performance upgrades. Ready to get more from your diesel vehicle? Give us a call and let’s figure out how to improve your ride.

At State Line Diesel Performance LLC, we offer vehicle performance upgrades for those in Rock Hill, Columbia, Greenville, York, McConnells, Chester, Tega Cay, Clover, Fort Mill, and Indian Land, South Carolina; Charlotte, Greensboro, Raleigh, Kings Mountain, Gastonia, Waxhaw, Ballantyne, Weddington, and Monroe, North Carolina; as well as North Atlanta, Georgia and surrounding areas.

Why Choose State Line Diesel Performance LLC?

When it comes to your truck, experience, skill, and attention to detail make all the difference in getting you back on the road quickly and safely. With over 15 years of hands-on experience, our team provides the maintenance and repair services your truck needs to perform at its best.

What Our Satisfied Customers Have to Say

Gordon & Dani Heitman

Professional, Knowledgeable, and Friendly!!! They get the job done right the first time and at a reasonable price. Thanks Guys!!

Alex Tate

Had a great experience and highly recommend their services. Great customer service as well.

Kyle “Dobe2901” Mitchell

Very knowledgeable on trucks. Even though they normally work on diesel trucks. They worked on my Nissan Titan for some fab work on the mounting bracket for lower control arm. Looks like it never happened. They were able to keep their time line of 2-3 weeks for completion.

Devin Hall

great place, good prices and easy to work with

Guadalupe Juarez

We take our trucks there because we trust their work and they always communicate with us if they run in to an issue or if anything else needs to be done . Definitely recommend

Scott Lemons

After another shop worked on my 2024 Ford F-350 Super Duty, I ended up having to redo almost everything. Thankfully I found Stateline Diesel, and the difference was night and day.

These guys actually know what they’re doing. They went through the truck correctly, fixed the issues the previous shop created, and made sure everything was done right the first time. Communication was great, turnaround time was solid, and the quality of work gave me confidence in my truck again.

It’s hard finding a shop you can truly trust, especially with newer diesel trucks, but Stateline Diesel earned my business going forward. Highly recommend them to anyone needing honest, knowledgeable diesel work done right.

Todd Boyle

Jake and his team at Stateline Diesel Performance are First Class. They are very knowledgeable, detailed and transparent on everything.

Finders keeperz

I highly recommend this shop. Allow me to “highlight” Jake! He’s professional, knowledgeable, and attended to all my questions and concerns. Ultimately he delivered excellent customer service! -Russ R

Angela Vega

I’m honestly surprised by some of the reviews I’ve seen, because my experience with State Line Diesel, their employees, and especially the owner has been nothing but positive.

I’m a woman who drives a big truck, and for most of my life my dream was to own a monster truck! Now, at my age, I’ve toned it down just a bit—but not too much. I lifted my truck 8 inches, changed the tires to 37s, added rock lights, cab lights, grill lights, and new wheels. From start to finish, everyone at Stateline Diesel was incredibly kind, welcoming, and made me feel right at home.

At the end of the day, this is an automotive shop. They’re not trying to win a Mr. Congeniality award—and frankly, I don’t expect them to. I don’t get offended by directness. What matters to me is being respectful, being professional, and doing quality work. Stateline Diesel is here to do great work on trucks, and that’s exactly what they did. If some people are upset about the owner’s personality, maybe that’s something they need to reflect on themselves. I’m far more concerned with skill, integrity, and results—and this shop delivers on all three.

State Line takes real pride in their work, and if something isn’t to your liking, they make it right. I truly appreciate their honesty, transparency in pricing, and straightforward feedback. At the end of the day, this is a business—they can’t give things away for free. Quality work costs money, they need to pay their technicians, and truck upgrades don’t come cheap. But when you’re investing this kind of money, you want to take your truck somewhere that genuinely cares.

State Line Diesel does exactly that, and I wouldn’t hesitate to recommend them!

Joshua Meyers

I don’t think I have ever left a review before, so the fact that I am going out of my way to leave one for these folks should speak for itself.

The folks over here are honest and went above and beyond to take care of me.

Are they busy? absolutely. But that should be an indicator to you of the work that they do because people want their business. So be patient with them and give them some sympathy! Good work is hard to find in this business and they deliver it so be patient with them and they will make sure you are taken care of!

I’m definitely going to continue to do business with them. It’s very hard to find genuine people who are just trying to take care of people. Look no further if that’s what you are after.