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  1. Focus ST Discussions
    Hey I have a 2015 focus st with a 91/93 jst custom tune and I bought it with this on it already. Recently the knock sensor on the cobb ap like jumps from 0 to 1 but like for a split second but still says 0/1 knocks detected. Also the negative ign has been jumping a little bit compared to normal...
  2. Focus ST Performance
    I've been running the monster tune since early May and since then I can honestly say the car has never run better. I daily the car so its seen alot of miles and mountain runs with no issues. This is one of the safest stock turbo tunes you can get for the focus st / fiesta st. I promise you...