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  1. FAMS vs. GINTANI (or neither?)

    E60 M5 and E61 M5 Touring Discussion
    Based on reviews and what I’ve researched, the best overall tunes that don’t require a dyno seem to be these two. Which one is better? I was going to pull the trigger on FAMS until I heard unsettling stories of blown pistons, and Gintani has a credibility issue? Tuners also laugh at the idea...