Mos Speed Shop, LLC - Dallas (GA)

5 /5 Vez: Marty and Jeff are amazing! This will be the 4th car in our fleet that they have tuned. Never had an issue, very knowledgeable, amazing customer service, and they make the tuning process very easy. If issues arise during tuning, they work with you to figure it out and get the car sorted. We recommend Marty and Jeff to all our clients and friends.

5 /5 Jose ramiro: ​I dont have words to describe how good Marty and Jeff are. I got a remote tuning from them. The process was so smooth and fast, very knowledgeable people and patient. They even helped me to get some issues fixed. Ill definitely work with them again in my future projects. 10/10

5 /5 Kevin: These guys live and breathe ford modular engines. Everyone and their mother recommends Marty and Jeff to tune their build and I tell you what these guys are definitely proving themselves. They tuned my 2003 Ford Mustang GT that I installed a turbo kit on along with a big fuel system and injectors. The start up tune was spot on. I loaded it car lit right off and ran great. I called Marty after I got everything buttoned up to do the remote tune Marty and Jeff are hilarious and are extremely knowledgeable and precise on what they do not only is the tune safe But it is way more than a night and day difference on how the car performed before to what it is now I can’t recommend and thank these guys enough if you’re on the fence, please just give these guys a call. You won’t be more than 30 seconds on the phone with them and realize that these are the guys you want tuning your vehicle. The customer service is impeccable that you won’t find anywhere else these days. Trust me you won’t be disappointed. This is coming from a 10 year Ford senior master technician. These guys know there shit

5 /5 Anthony Tucker: Marty and Jeff are outstanding guys who got my 2004 Mach 1 running great. They will not only tune your car but help you troubleshoot any issues as well while having fantastic customer service. 10/10 will absolutely recommend them to anyone.

5 /5 Leon: If I could give more than five stars, I would. This was hands down the best experience I’ve had with a performance shop. I called for a tune, and Marty responded immediately—then went above and beyond by helping me troubleshoot another issue at no extra cost. He even did a remote session after hours on a holiday. Absolutely unbeatable support.