September 2024
Absolutely amazing service for my 9th Gen Civic Si. The tune made it night and day difference. Can't reccomend JST enough!
September 2024
100% happy with the customer service from JST-Performance. Ordered custom tune for my FBO Focus ST, very fast turn around times on tune revisions, open to answering all questions. I would not hesitate to recommend to anyone looking for parts/tuning/help/advice.
September 2024
I own a 2018 Focus RS. I used another tuner on my first go-round and was not thrilled with the results. Brian has now tuned the car twice for me (before and after parts upgrades) and I couldn’t be happier. He has also installed upgraded parts and performed maintenance for me as well (brake-work, spark plugs, etc.)
