Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
A four-piston fixed caliper for the left side, this Forged Superlite 4R has 1.88/1.75-inch stainless bores and a hard-anodized body. Its radial attachment places the mounting adjustment in a different arrangement from a conventional lug-mount Superlite. Bill Wood founded Wilwood Engineering in 1977, and the company is based in Camarillo, California. It designs and manufactures disc brake systems and a component range of calipers, brake rotors, master cylinders, valves, fittings and brake lines serving motorsport, street-performance and specialized installations.
Technical Details
- Manufacturer part number: 120-13228. Component: Forged Superlite 4 Radial Mount caliper.
- Supply: one brake caliper, not a complete axle brake kit. Match the mating rotor, pads, bracket and connection hardware to the installation.
- Pistons: 4 stainless steel; bore specification: 1.88/1.75 inches. Effective piston area: 5.18 sq in.
- Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.
- Rotor compatibility: nominal width 1.25 inch; diameter 11.75–14.00 inches. Specified rotor-width limits: 1.15–1.35 inch.
- Compatible brake pad shape: 7420; choose the required compound for the brake system.
- Piston dust boots: not fitted.
- Mounting: radial, 5.98-inch centers; left hand orientation. Mount holes: 0.39 inch; height: 1.63 inches.
- Body: forged aluminum; finish: Type III anodize.
- Caliper weight: approximately 5.2 lb.
Fitment & Compatibility
Establish the rotor centerline before choosing a 5.98-inch radial bracket. Check type 7420 pad clearance, the 1.25-inch nominal rotor width and the hydraulic area required by the existing master cylinder.
For a replacement or custom installation, send PMB Performance the brake dimensions and existing component identification. Our 20+ years of experience can help narrow down the correct combination.
