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February 2024 by Donna Smith
I 100% recommend jst if you’re looking for a good tuner! I got a 93 and e30 tune and the car runs so much smoother. The car pulls all the way up top now rather than before it would start loosing power. It also gained a pretty good bit of power. It over all runs really good! I’m happy with the results and I would 100% again choose jst.
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January 2024 by Jordan Jackson
These guys are awesome!! I had FMIC and CAI when I purchased the AP3for my Focus ST. I ran an OTS tune for about a month before I got e30 tuned with JST. What a difference, the car feels great and pulls hard. The tuning experience was a breeze as many other reviewers have also mentioned. The team even did a final revision for my car after I installed my downpipe which was a few months later! Can’t wait to go big turbo and JST will definitely be my go to tuner!! Thanks again!!
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January 2024 by Steve Ruiz
One of the best Tuners I've ever dealt with. Not only did he provide quick responses but was able to dial in my brand-new s280 without any hiccups. I recommend JST to all my friends and so should you!
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November 2023 by jake skate
Jst Preformance helped me understand my vehicle better!I’m new to the turbo platform and they were patient and very timely!I even forgot to update my shippin info!After emailing (Within one day) they were able to fix it for me.100% reccomend!
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October 2023 by M N
Made the commute to Georgia all the way from Florida for JST. Owner installed lots of parts onto the fiesta st. Great place and owner stands by his work. Highly recommend for ford performance.
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October 2023 by Louie sirbone
Very easy interaction with the Tuner . And the tune feels better than stock in my opinion, very smooth power band would definitely recommend for your Bolton focus ST.
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September 2023 by Kevin Lovan
Ordered some parts and a remote tune for my Focus RS. Parts shipped quickly and the remote tuning process was awesome! Quick to respond and answer any questions.
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September 2023 by Nolan Walter
If you've already invested in bolt-ons for your Focus/Fiesta ST, a custom tune from JST is without a doubt some of the best money you can spend on your car. The driving feel with my Stage 2 map is light years more fun compared to how it was stock. I'm very happy with how quick the process was. You won't be disappointed with a JST custom tune!
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September 2023 by The Ricky Channel
Tuning my Fiesta ST with JST was a great experience. The car is quicker and smoother for sure. The tune was revised 4 times, each time they were sent back to me quickly. I highly recommend JST!
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July 2023 by Rajan Singh
Highly recommend the e tuning services. I purchased a 91 and e30 tune, and couldn’t be happier with the result. The process was easy, emails containing the revisions were fast. Communication is excellent, all questions I had were answered. I am extremely happy with the both tunes, and especially with ethanol the car pulls hard and smoothly.Definitely recommend for any fiesta st owner deciding which tuner to go with.
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July 2023 by Shane Spratford
I purchased a GTX2867R Gen 2 w/ tune for my focus st. The install was easy and the Etune really makes this thing rip. The tuner responded quickly to new datalogs and answered any questions that I had.
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July 2023 by Joshua Frakes
Great group of folks for the ecoboost platform. Very punctual on everything they've done for me. The easiest, most successful e-tuning I've done on my FoST platform. Very informative, as well as educational if you're just starting out with this platform.
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July 2023 by donnie lombardi
Brian over at JST performance is the man! I purchased a AP with a pro tune revision. Super happy with the end results. Super helpful to deal with, their response time with tunes was very quickly once we started the first revision. We did over 20 datalogs before he satisfied with tweaking it how he wanted. Car is noticeably faster and the power comes in very smooth. Definitely will continue business with JST
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July 2023 by Sean Magowan
Did a online E-tune with JST for my focus st and the difference from stock to my car now is huge. Awesome communication during the process even without them being physically next to you. If you want a simple E-tuning process with amazing results these guys are your best bet ?!
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June 2023 by Vicente Qiu
Hi I wanted to take the time to write a brief review of my experience working with Brian Tyson from JST, I spent months with him and his customer service team, to find out how to set up all the mods on my car and what the process would be like. As expected his service was fantastic, he answered all my questions and in less than 3 weeks my car was completely finished, truly if you are thinking of having your car tuned by someone the right one is Brian Tyson.
