Wilwood - wil120-11331 - Forged Superlite 4-ST Caliper with 1.88/1.75 in Pistons for 1.25 in Disc

FSLI4 and FSLI4/ST calipers provide the pad wear performance advantages of differential bore pistons with the option for ultimate heat protection using Thermlock® pistons in the ST models. Differential piston bores compensate for leading-edge mechanical loading and temperature variances across the pad face to reduce pad taper wear in sustained high temperature applications. Thermlock® pistons in the ST models block heat transfer from the pads and reduce temperatures in the caliper, fluid, and seals by up to 25% over standard stainless steel pistons. These are the go-to calipers for all types sustained hard braking on dirt and asphalt ovals and a wide range of off-road, rally and road course applications.

Brief Description: The Wilwood Forged Superlite 4-ST caliper is designed for sustained hard braking applications on dirt and asphalt ovals, as well as off-road, rally, and road course use. It features differential bore pistons to help manage mechanical loading and temperature differences across the brake pad face.

Key Features & Performance Benefits:

• Differential bore pistons: Help reduce pad taper wear during sustained high-temperature braking.
• Therमlock® pistons: Help block heat transfer from the brake pads in ST models.
• Reduced component temperatures: Thermlock® pistons can reduce temperatures in the caliper, brake fluid, and seals by up to 25% compared with standard stainless steel pistons.
• Versatile performance application: Developed for hard braking across oval-track, off-road, rally, and road course applications.

Key Product Specifications & Technical Data:

• Brand: Wilwood
• Part number: wil120-11331
• Caliper series: Forged Superlite 4-ST
• Piston configuration: 1.88-inch and 1.75-inch pistons
• Disc specification: 1.25-inch disc
• Piston technology: Differential bore pistons
• Thermal protection: Thermlock® pistons
• Application type: Automotive braking

What's Included in the Box: One Wilwood Forged Superlite 4-ST caliper.

Fitment: Fitment data was not provided.

Air Freight Prohibited: false
Not Carb Approved: false
Ltl Freight Required: false
Prop 65: Unknown
Part Type: automotive
Epa: N/A
Carb Acknowledgement Required: false
Regular Stock: false
Units Per Sku: 1