Wilwood 120-17508 Forged Narrow Superlite Six-Piston Brake Caliper - 6R

The Wilwood Forged Narrow Superlite 6R/ST (FNSL6R/ST) represents the latest evolution in high-performance brake caliper technology, designed to deliver exceptional stopping power in extreme high-temperature racing and performance applications. This forged six-piston caliper integrates advanced thermal management technology and a stress-flow forged body construction for maximum strength and reliability.

Advanced Forged Construction:

Each caliper body is stress-flow forged from premium-grade aluminum alloy billets, a process that re-aligns the metal's internal grain structure to flow within the contour of the caliper body. This eliminates internal stresses and grain interruptions that occur in traditional billet machining, resulting in superior strength and durability. Despite its robust construction, the FNSL6R weighs just 4.9 pounds, thanks to computer-generated solid modeling and FEA stress analysis optimization.

Thermlock Piston Technology:

Wilwood's exclusive Thermlock pistons feature a multi-part design that creates a highly efficient thermal barrier, significantly reducing heat transfer from the brake pads to the caliper body, seals, and brake fluid. This thermal management translates to cooler operating temperatures, extended component service life, and reduced risk of heat-induced brake fade during sustained hard braking.

Key Features:

• Six-piston differential bore configuration for balanced pad loading and even wear
• SRS (Stainless Rotor Saver) bridge plates eliminate bridge wear from pad gouging and extend caliper life
• Spring-loaded SRS plates prevent pad rattle and dampen harmonic vibrations that cause brake squeal
• Two-piece bleed screws on each end with internal fluid crossovers protected from track debris
• High-temperature square-faced bore seals provide maximum sealing area and controlled piston retraction
• Compatible with full range of Wilwood pad compounds for various applications and heat ranges
• Designed for extreme high-temperature racing and performance environments

The Forged Narrow Superlite 6R/ST caliper is engineered for serious competition and high-performance street applications where maximum braking performance, thermal management, and long-term durability are essential.