Beautiful New Facility the ready to accommodate all your automotive needs. Great staff, good prices and on the spot servicing.Everything from parts, dyno, tuning, wheel balancing, alignments, YOU name it, all under the same roof!...

Awesome place! If you have an Audi this is your place! Super knowledgeable, honest and fast.

Greatest customer service I have ever seen in Audi tuning field. Very professional and will give you exactly what you need every time.Thank you For making my s6 scream at 9,000rpm Marc!

A buddy recommended them to me. I was looking for a quote on an engine replacement on my 08 bmw and they were very forward with prices and the possibilities there were, was quick and responded to my inquiry within the day.

Excellent job used for dyno rental and went very smoothly

Mark is the best tuner always satisfied with his work!

Mark was super professional and helpful with everything that was performed on my car. I will recommend him to anyone that needs work. I had a misfire on my avant that I had spent months trying to fix and he fixes it within a few days. Will be taking my car there in the future.

Marc came through when I asked him to do an upgrade to my B9 A5. It was not a standard plug it in and go so it took time but I am super happy with the finished product. Final hp targets were significantly exceeded and now bigger, much bigger brakes are in the works. The A5 B9 2.0T is a blast to drive with s-tronic & 470+ at the wheels, its hard to get the grin off my mug....Jeff

Best for tuning around the area hands down

I purchased an LS 6.0 motor from Just Chevy Trucks in Lebanon Maine.I put this motor along with a 4L80E Transmission in my 1979 Chevy C-10.The motor and transmission was working great, so I was skeptical about how much of an impact a dyno would have, but I did it because it was recommended by numerous people, including the folks at Just Chevy Trucks.Mark at EFI express is unbelievably knowledgeable about all things tuning, this guy could be running missile systems for the Pentagon, he’s unbelievably smart.In just a couple hours time between set up and making runs he then went for a drive with me. I am absolutely stunned by what this process did for the motor and transmission, and for a total cost of $325.00 dollars.For what Mark does, this is worth three times what he charges. Worth every cent!

Got my 335xi tuned at a great price!The owner Mark is awesome and well knowledged. I will be back in the future for tuning and if i need to get my car fixed.

Mark is second to none. If you value your vehicle, bring it to mark for diagnosis

Mark claimed he had experience tuning Chevrolet’s, so I made the mistake of going to him. After hacking apart a $700 harness I was told I needed to buy a stock Ecu because “he knew how to tune those”... I take my car home the winter planning to bring it back to be finished in the spring. Spring comes and I can’t get in touch with him. Why? Turns out the harness he installed was complete junk and wired COMPLETELY incorrectly. $1300 for a waste of my time.

Hard to find, but worth the hunt. Went for a Unitronic tune on my Audi. Small home-based garage. Very friendly, good service.

Went there to get unitronic tune on short notice got me right in. Down to earth knowledgeable guys! Will revisit when needed!

Have been relaying on Marks and his team expertise to build my 600+HP UrS4. Their knowledge is vast and invaluable when it comes older Audi models!

Very good guy and honest and if you have a vw or an Audi he is the expert

Mark and crew are awesome. Their knowledge and persistence is over the top!!

Other Audi tuning shops, or repair shops cannot even compete with this foreign auto repair shop.I received my b5 s4 back from getting a custom tune for my ko4 set up. And could not be more thankful for EFI express.Other Audi shops could not figure out the problem with my vehicle.EFI found, and solved every problem.Edit *2 Years later: I could not pin point a drivetrain whine on my b5 s4. I contacted EFI express, and was prompted to come in the same day(Monday) for a diagnosis of the problem.The s4 ended up needing the differential replaced. EFI Express ordered a like new one. And installed it, VERY promptly 2 days later. These guys could arguably be the best in the world when it comes to audi repairs, and tuning. Fair prices as well!Thank you EFI Express!

Excellent talent, Marc is highly respected for Euro car tuning

If they cant performance tune it, nobody can. 2 and 4-wheel dyno available.

Melted pistons express. thank you for all your help Mark!