Mo's Speed Shop, LLC in
Dallas (GA)

Talk about a car guy in the candy store!!! Super knowledgeable, super friendly. Delighted with the results. We will take other of our hot rods to them for tuneage that others couldn't and wouldn't touch. My hats off to me!

Cannot recommend Mo's highly enough! Absolutely impeccable customer support...patient, knowledgeable, responsive, and professional, all at fair prices. And Marty is the Carroll Shelby of Crown Vics!!

Best tuners in the country, hands down! Jeff and Marty were extremely patient with my busy schedule — I’m in the Army, so it’s always changing. On the very first day we started tuning, within about 10 seconds they immediately spotted a mechanical issue with my car: my fuel pump was going bad, and my O2 sensor wasn’t reading at all. I replaced the fuel pump and instantly noticed a difference — on that first startup it roared to life like never before! After swapping the O2 sensor, everything started reading correctly. When it came time to finish tuning, Jeff and Marty even took time out of their own evening, late at night, to help me get my car dialed in perfectly. Now the car rips like none other! I’ll never take my vehicles to any other tuner. These guys truly care and know exactly what they’re doing.

Marty and Jeff are the greatest kind of people there are, there funny, there kind and all around just mean well. I really enjoyed working with them, they always answered and even got me in a session before scheduling. And the car runs great!

Marty and Jeff are very good at there work, got multiple cars tuned by them and they always do a good job wouldn’t take my car anywhere else, overall 10/10

I was just referred to Marty @ Mo`s Speed Shop.... He took great care of me and my 2004 Mercury Marauder. I got the SCT4 Tuner and 1 of his tunes specific to the car. Well let me tell you!! All Marauders should have this tune !!! It took all that "in and out" of 3rd and 4th gear away....... I now own a real Marauder! Before it was just an imitation

I’m had Marty and Jeff tune my 97 procharged cobra. Both have been very professional and helpful with trying to dial it in. We have worked out a few issues and now the car is a beast! It never ran this great. Those guys are truly amazing at their craft. They have incredible passion for the automotive world and will be able to get any issue you have done right. I will be using them on future projects in the future.

Go straight to Marty and Jeff before you start your build. They have been Awesome! They have done everything to help me get my wiring and tune squared away. They even offered to work on it . Most recently provided me a crucial part that was missing fom my harness.

I got recommended to this place by a good friend of mine. This is one of the best place in the business of building fast cars. I took my Metallic Gold 1998 Trans Am to be tuned and Dyno by Jeff. His honesty and heightened sense of integrity about what he does there. Is like no other I have experience before. What I have observed about Jeff, it is more about perfection and satisfaction than it is about money. And that is very rare thing in this business. For me and most car enthusiast it's everything. And I appreciate that. Having said that, that made my experience there all the better. I would like to thank Jeff and the staff at Moe's speed shop for all they have done for me in my car. I will be by to say hello every so often and look at those awesome cars you have in the shop and outside the shop. Thanks again ?????

I can’t say enough good about Marty and his guys. I went to them looking for a remote tune for supercharged car. Marty was quick to respond and answer any and all questions I had. The tuning process was great and the car runs amazing. Marty was super patient and helpful when it came to issues while we were tuning. It’s hard to find good, honest, knowledgeable and caring guys in this industry these days but Marty and his team check all the boxes I wouldn’t hesitate to recommended them to anybody and I will be using them again in the future.

I had my 2001 mustang bullitt remote tuned after I installed cams. My local tuner couldn’t figure out how to get the drivability right but Marty and Jeff worked their magic! Car runs amazing now and pulls hard! These guys are who you need to contact for tuning . Period. Don’t waste your time or money going somewhere else. You’ll just end up back here getting them to fix it.

Called them for a remote tune. Being in the military I'm kinda strapped for time. Marty and Jeff scheduled me for a Sunday afternoon and man, the time tuning was fun and got my car running great. Not only that, they gave me some tips to improve my foxbody that wouldn't break the bank. Thank you Marty and Jeff, next time I'm passing through ATL, I will swing by and say hi.

The Only Speed Shop I Trust I’ve been a loyal customer of Mo’s Speed Shop for nearly a decade and wouldn’t trust my cars with anyone else. I’ve received several remote custom tunes from Marty, and every single one has been perfect—more power, smooth drivability, and always reliable. Marty’s knowledge is unmatched, and the customer service is second to none!

2005 ford mustang gt, this was my first time throwing a set of cams in a car, Marty was more than helpful from the beginning and was very patient and knowledgeable. Not only that but Marty helped me with the CELs that came on afterwards, he went above and beyond anything I expected. Car runs absolutely perfect. If this is your first time getting a car tuned don’t be worried you are in great hands. 10000/10! Can’t recommend enough!!!!

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

​I don't 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. I'll definitely work with them again in my future projects. 10/10

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.

I picked up a really well done Chevy Colorado (LS swapped) that needed a tune. Jeff was awesome. Direct, to the point, and took care of the minor issues that always show up for a good price. About 2 months out and I’m still surprised at how much better it drives cruising and WOT. Time for boost!

My first remote tuning experience and it was great! Marty and Jeff did a great job and were patient and helped me figure out a few issues I had with the vehicle. Would definitely recommend and would come back again in the future if need tuning again!

The absolute best remote tuning I have ever experienced. First session got the idle down, and then Marty had me do one pull 2000-4000rpm. He instantly showed me the log and recognized that my fuel pressure was not consistent. Then proceeded to ask me if I put an aftermarket pump into the stock hat. Spot on he knew exactly what it was just by looking at the data. The fuel pressure wasn't consistent because of this. 1 week later with the new pump in we got it dialed in on 93 octane. Vortech v3 SI with a 3.33 pulley... she RIPS! Highly recommend to anyone. Thank you again!

Well I normally leave reviews using ChatGPT because I’m lazy BUT Marty and Jeff deserve MY honest and uneducated words! What an AWESOME experience, Marty and Jeff both took time to help get the Kenne Bell tune perfect ??. Marty even answered my accidental late night texts as I was getting ready to tune and wanted to make sure I had everything hooked up! Live tuning is the way to go, and not bama tunes or emailing. Wish I could give more stars, I’ll back for more. Thanks again for everything ⭐️⭐️⭐️⭐️⭐️

I can't say enough good things about the team at Mo's Speed Shop. From the initial conversation around my issue to keeping me informed through the process, to fair pricing and explanation of next steps during delivery; everything about this shop is perfect. I had a clutch failure on my 2014 GT500 and these folks made me feel comfortable throughout the process. Helped me to fully understand the cause, issues, and helped me sort out a few other things on this 10 year old car. They returned it to me in perfect condition and treated it as their own. The car drives 10x better than before it went in, it feels great; like it should have been all along. Exceptional service, exceptional work. I will be a lifetime customer. Thank you Jeff, Ryan, Mary and the whole team at Mo's for fixing my car RIGHT.

I have purchased tunes for my Crown Vic from Marty, both as an automatic car and now a manual swapped car. I have been more than pleased with the results from these tunes, and even more impressed with the customer service and personal support I received from Marty and his team at Mo's. He has helped me tremendously over text and phone with everything from diagnostic issues to fabrication questions. Marty is courteous, professional, patient and definitely maintains an interest in the success of his customers.

The Marty tune loaded onto my Crown Vic transformed it into a much more pleasant and lively vehicle to drive. But not just that, Marty goes the extra mile to help out and the service is second to none. He helped me resolve an issue with my programmer (despite it being outside of his remit) and saved me $$$ and for this I’m very thankful. Highly recommended.

Very Professional to work with! Very responsive and informative from the first time I spoke with Marty about getting a custom tune for my vehicle. He told me everything that was needed on my end for him to properly tune my car and responded in a timely manner to questions I had leading up to my first tuning session. The night of the tuning session everything went smooth. I could not be more pleased with the professionalism of Mo’s Speed Shop (Marty & Jeff). Highly recommend to anyone. Great crew!! Look forward to working with them with future projects!!

Just to say, this is the only shop I will take any of my custom or modified muscle cars to. They are courteous, quick, and professional. They always take their time and discuss the problems my vehicle has and what all the possible solutions may be. I had originally brought my '03 Town Car here (Long tube headers, throttle body, bash bar etc) they tuned the car and after a day knew more about it then I did. I recently started bringing my '06 Mustang GT as well. All the same they were quick, and considerate. They found a couple of other issues with the car and gave honest advice on what they would do to repair it, all in all I have yet to find another shop that listens to my concerns and never tries to over complicate a small problem.

Jeff and the fellas at Moe's are experienced subject matter experts in building, repairing and testing your four wheeled dreams, your weekend projects and your daily drivers. Having the solid reputation for performing high quality work with proven results you must be sure to contact them well in advance to get on their very busy schedule. Odds are real good that you won't be disappointed.