Check the listing for details. Street Rod Bolt On Rear Disc Brake Kit with Emergency Brake Calipers by PEM. Condition: New. Listed at 459.00 USD. PEM Econo Rear Disc Brake Kit with Emergency Brake Calipers for 9" Ford This 9 inc Ford Disc Brake Kit kit includes bolt-on caliper brackets11-1/4" vented rotors with 5 on 4-1/2" and 5 on 4-3/4" bolt circlesRotor is 11.25" OD x .960" wideThe centering hub register hole on these rotors is 2.78" ID. Make sure and measure the hub register on your axles. (some are 3.06" OD)Rotor has 6.25" Inside DiameterRotor offset of 2.25"4.5 bolt circle has 1/2" stud holes and 4.75" bolt circle has 7/16" stud holesThe brackets fit the Large Old Style Ford and the New Style Large Torino Housing Ends shown in picture # 11 above. '78-'88 GM emergency brake calipers, brake pads and hardware.Minimum 15" diameter wheels. Caliper piston size is 2.375" OD. Disclaimer. Warning! Auto racing is a hazardous sport. No warranty or guarantee is made or implied regarding any racing product sold by Performance Engineering and Manufacturing, LLC. User assumes all risks. We will ship using UPS Ground or Speedee Delivery in the Upper Midwest. We will ship with Insurance and will send a Tracking/Delivery Confirmation Number after shipped. WARNING: Cancer And Reproductive Harm- www.P65Warnings.ca.gov