Ducts that are purpose built for one thing, cooler brakes and quicker recovery from fade after hard braking. Large frontal inlet mouth scoops fresh incoming high speed air and directs it where it is needed. True internal flow ducting is the surest way to produce the most potent form of high speed air delivery. Our roots in aerospace design allow us to push the envelope of brake cooling for the Focus ST.

Fits 12.6", 13.1" rotors as well as aftermarket brake setups.

Bolts right on to your A-arm with no hassle, less than 15 minute install time per side.

Comes with all stainless hardware and endless color options.

Stage 1 ducts and BIG MOUTH track tested with on-board rotor temperature diagnostics, samples taken at 12 Hz using infrared thermometer and data acquisition during racing sessions. Driven through hundreds of racing sessions under extreme ambient conditions (Arizona motorsports park and Arizona Wildhorse pass, ambient temperatures in the 100s) . Before and after results were recorded as well as a lot of positive driver feedback. Data indicates that the rate of heat rejection is (slope of the temperature vs time plot) improved greatly, as well as maximum rotor temperature and transients (cooling immediately coming out of a turn).

If your 2013-2018 Focus ST needs brake cooling, you found it.

NOTE: Not intended to be driven in daily conditions, track-use only is highly recommended.