Caliper spacing is 3-1/2" for the Wilwood GP320 4-piston caliper (part # 36-101). Fits the Hyper 600cc Jacob's Ladder Chassis. Uses the 9-1/4" brake rotor. Bearing and snap ring included.We recommend the bearings be greased before the first use with Champion Grease 74-332.
Uses 20.5" steel brake rod on '07 & Up Hyper Chassis.