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  1. MAPerformance OTS Tune on ACN91 gas safe?

    ECU Tuning & Performance Electronics
    Hey, IWSTI form! I've had my 2015 sti for about two years now, buying used off of a friend who I knew treated her well, and I'm looking into tuning options for the car once the warranty is up, coming up here in 3,000 miles for the whole drive-train and 23,000 more for the engine bearings. I...