Upgrading to NGK 6510 Focus ST plugs for more power
If you're pushing more boost through your EcoBoost engine, switching to the ngk 6510 focus st spark plugs is probably the smartest $40 maintenance move you'll ever make. Anyone who has spent more than five minutes on a Ford forum knows that these little iridium plugs are basically the "gold standard" for the 2.0L platform, especially once you start messing with tunes or bigger intercoolers. But why exactly are we all obsessed with a specific set of spark plugs? ...