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December 2023
John is amazing with a computer!!! He tuned my 04 Chevy after I put header and a cam in it.
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November 2023
Using Roastin Performance was a great decision. John was instrumental with diagnosing operational issues prior to the tune. He was dedicated to getting my boosted truck running the way it alway should have. Always a pleasure to deal with a professional and an honest person. Thanks
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October 2023
I called John and he explained so much to me and my car wasn't even in his hands yet...a few days later it was and when I say I am beyond happy ?...I am , it came from another guy and I wasn't happy at all but after John put his hands on it I was. My c7 is really fun and fast now
