Check the listing for details. Street Rod Weld On Econo Brake Rear Disc Kit for 9" Ford. Condition: New. Listed at 232.26 USD. PEM Weld On Rear Disc Brake Kit for 9" Ford with GM Metric Brake Calipers This kit includes weld-on caliper brackets; these brackets will work with 3" and 3.25" OD round axle tubes.11-1/4" OD vented rotors with 5 on 4-1/2" and 5 on 4-3/4" bolt circles4.5 bolt circle has 1/2" stud holes and 4.75" bolt circle has 7/16" stud holes11.25" OD Rotor has 6.25" ID x .960" thick and 2.25" hat offset.Rotor has 2.78" Hub Register '78-'88 GM Metric brake calipers, D154 brake pads and hardware. Calipers have Emergency Brake Hardware as shown.The brackets fit both the ends for Big Bearing 3.15" OD Bearing for the Old Style Big Ford with 1/.2" bolts and the New Style Torino Big Ford with 3/8" bolts.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