Wilwood 140-12518 Forged Superlite Big Brake Front Kit Road Race - 4R/ST

The Wilwood 140-12518 is a complete front big brake kit engineered specifically for dedicated road racing. Built around the Forged Superlite FSL4R/ST four-piston calipers, this kit features a forged aluminum caliper body finished with a Type III Mil-Spec hard anodized medium gray coating for exceptional wear resistance in the piston bores and outstanding protection against abrasion and corrosion.

Caliper & Thermal Management:

• Thermlock® pistons reduce heat transfer from pads to caliper, increasing fade resistance and extending service life by lowering temperatures in the caliper body, fluid, and seals
• Internal damper springs and controlled retraction, high-temperature piston seals ensure consistent pedal height throughout the race
• Piston volumes are matched for full compatibility with OE power brake boosters and master cylinders, as well as manual brake conversions with balance bar pedals using appropriately sized master cylinders

Rotor & Hub Assembly:

• Spec37 alloy GT competition series 12.19" diameter directional vane rotors deliver high cooling efficiency with rugged durability and thermal stability under sustained high-heat competition conditions
• Forged aluminum hubs and rotor mounting hats minimize unsprung and rotating weight during assembly

Kit Includes:

• FSL4R/ST four-piston forged aluminum calipers with Type III hard anodized finish
• 12.19" Spec37 alloy GT series directional vane rotors
• Forged aluminum rotor mounting hats and hubs
• Machined billet radial mount caliper brackets with all premium-grade fasteners
• High-temperature, high-friction endurance race compound brake pads
• Stainless steel braided flexlines (Brake Line Kit 220-8307)

Important Installation Note: This kit is designed for use with OE factory single-piston caliper spindles that have been modified to accept Wilwood caliper brackets. A detailed illustration of the required spindle modifications is included on page 2 of the assembly instructions. Bracket hardware secures the calipers in the stock location following completion of those modifications.

This championship-proven road race brake system delivers race-caliber stopping power, fade resistance, and thermal management for serious competition use.