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  1. Focus ST Maintenance
    Greetings, everyone! First post here. Apologies if I'm posting it in the wrong sub-forum. In any case, I recently got a 2014 Focus ST2. It's a little rough around the edges, and it's got a lot of miles (150k km) It does have one concerning sound, and it gets even more intense at higher RPMs...
  2. Focus ST Maintenance
    I know a lot of people post about the usual rattle that comes from the right side of the engine but this is different. I took the cover off my air filter to hear what all the talks about and found out I had a k&m air filter. I had no idea since I bought it from a dealership thinking it was...
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