Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
Wilwood side-inlet Forged Superlite Internal for a matched sprint-car inboard rear brake. Check four 1.75-inch pistons, 3.50-inch lugs and 0.81-inch rotor width. The side inlet is documented for sprint-car inboard rear use; match the actual bracket and rotor arrangement. From its base in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems and components. Founded by Bill Wood in 1977, its range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines for motorsport, street-performance and specialized applications.
Technical Details
- Manufacturer part number: 120-11134-SI. Component: Forged Superlite Internal caliper.
- Supply: one brake caliper, not a complete axle brake kit. Match the mating rotor, pads, bracket and connection hardware to the installation.
- Piston dust boots: not fitted.
- Body: forged aluminum; finish: Type III anodize.
- Compatible brake pad shape: 7420; choose the required compound for the brake system.
- Mounting: lug, 3.50-inch centers; universal orientation. Mount holes: 0.45 inch; height: 2.85 inches.
- Pistons: 4 stainless steel; bore specification: 1.75 inches. Effective piston area: 4.80 sq in.
- Rotor compatibility: nominal width 0.81 inch; diameter 11.75–13.06 inches. Specified rotor-width limits: 0.75–0.84 inch.
- Caliper weight: approximately 5.2 lb.
- Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.
Fitment & Compatibility
Confirm that the side inlet clears the bracket and surrounding driveline. Match the 3.50-inch lugs and 7420 pad sweep to the inboard rotor; the connection arrangement is separate from the bore and finish.
With 20+ years of experience, PMB Performance can help compare the actual brake hardware. Supply the caliper number, rotor dimensions and mounting measurements when asking about compatibility.
