Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
Thermlock pistons distinguish this right-hand Superlite 4R/ST from the standard stainless-piston configuration. It uses four differential bores of 1.88 and 1.75 inches, with a 1.25-inch nominal rotor-width cavity in a hard-anodized forging. Wilwood Engineering designs and manufactures disc brake systems for motorsport, street-performance and specialized applications. Bill Wood founded the company in 1977; it is based in Camarillo, California, and its component range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines.
Technical Details
- Manufacturer part number: 120-13263. 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.
- 5.98-inch radial mounting pattern, right hand; mounting height 1.63 inches and hole size 0.39 inch.
- Caliper weight: approximately 5.5 lb.
- 4 Thermlock pistons with 1.88/1.75-inch bore groups. The specified effective area is 5.18 sq in.
- The rotor channel is specified for 1.25-inch nominal width. Rotor outside diameter: 11.75 to 14.00 inches. Specified rotor-width limits: 1.15–1.35 inch.
- Piston dust boots: not fitted.
- Brake pad profile 7420; select friction material for the actual operating conditions.
- Hydraulic inlet thread: 1/8-27 NPT. Use a fitting with the correct thread and sealing seat.
- Type III anodize finish on a forged aluminum caliper body.
Fitment & Compatibility
Specify the Thermlock arrangement when matching an existing competition caliper. Check 5.98-inch radial mounting, rotor width within 1.15–1.35 inches and the chosen pad compound’s temperature requirements.
PMB Performance brings more than 20 years of experience to brake-part selection. Include the existing caliper, rotor and mounting details when requesting help with this assembly.
