JMS Racing

JMS Installed a Borla Cat Back Exhaust system on my 2025 Hyundai N-Sonata! Sounds great! They are the only performance shop in San Antonio that is willing to add hp to a Hyundai. All the other shops laughed at me! Great job guys . I'm definitely going to be getting more work done there

⭐⭐⭐⭐⭐ Absolutely Outstanding Service! JMS Racing exceeded all my expectations when working on my Corvette. From the moment I walked in, their team was professional, knowledgeable, and truly passionate about performance upgrades. They took the time to explain every step of the process, ensuring I understood exactly what was being done. The results? Absolutely phenomenal! My Corvette runs better t…

I can't thank JMS Racing enough. I had them do a good amount of work to my 2006 Evo 9 and it really transformed the car. With the new clutch and suspension components, the car really drives like it just drove off the showroom floor. Even when I found out the ACD reservoir was overfilled and AC was disconnected, they brought me in same day on a Saturday and fixed it within the hour. Truly grea…

JMS Built my 2003 Evo motor in 2019, and has been running strong for the past years of continuous use and abuse. Went in today for a small idle issue , and Antonio (Technician) was able to fix it in 20 minutes! I definitely recommend them for all kind of performance related issues.

Best performance shop in SA! They've taken care of multiple cars of mine over the last 10 years or so. Domestic, Import, Euro, no matter the platform, they have a long proven track record of service and knowledge. Don't let other pop up shops sway you away from JMS, those other shops come and go quite often but JMS has been around a long time and is here to stay.