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engine block

  1. Focus RS Discussions
    Quick update on my RS' history: bought used @ 8K miles, already had the new HG installed Threw cyl 3 misfires about a few months in, had a cracked head, replaced under warranty. Threw Cat codes about a couple months later, had cat replaced. Drove great for about a year, then had this issue about...
  2. Focus RS Performance
    I’ve been looking at pics of different engine blocks trying to get an idea of what would be the best set up for a strong reliable engine build. There are a number of options out there; Focus ST 2.0, 2016-2019 Fusion 2.0 Ecoboost or the Focus RS 2.3. All with the 2.3 internals of course. I’m...