Performance Machine Classic Rear Caliper Kit For Harley FX / FXR Going fast is good, but stopping is even better. Don't trust those stock calipers to tame you high horsepower hog! Upgrade to Performance Machine caliper and know that the most trusted name in aftermarket brakes has your back. Features: Performance Machine is the number one name in custom brake calipers Precision machined from billet aluminum 4 piston dual action design for positive stopping power Includes caliper and bracket