Spirited driving is now a family affair in a Ford. Ford needed a new herald for the ST badge since exiling their small car lineup to Europe and Australia. So, why not turn one of America's most popular SUVs into a performance machine? Thus, the Explorer ST was born. A 3-row monument to practicality now fitted with a heavy-hitting 3.0L twin-turbo EcoBoost, hunkered down suspension, and bolstered sport seats. From the factory, the Explorer ST already boasts enough grunt to shove you and the kids back in your seats, but we reckon there are more ponies to squeeze out, particularly through the intercooling system.

Ever since Ford brought the EcoBoost engines to life in the early 2010s, enthusiasts have been on a quest for more boost. The downside to added boost pressure, however, is that