Wilwood 120-17507 Forged Narrow Superlite 6R Six Piston Brake Caliper

The Wilwood Forged Narrow Superlite 6R/ST (FNSL6R/ST) represents the latest evolution in high-performance brake caliper technology, engineered for extreme racing and high-temperature applications. This six-piston caliper delivers exceptional stopping power while maintaining a remarkably lightweight design starting at just 4.9 pounds.

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 the internal stresses and grain interruptions that occur in conventional machined billet designs, creating the strongest possible aluminum caliper body. The design is optimized through computer-generated solid modeling and FEA stress analysis for maximum durability and efficiency.

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 pads to the caliper body, seals, and brake fluid. The unique six-piston differential bore configuration provides balanced pad loading for even wear, even in sustained high-heat environments. Cooler operating temperatures translate to extended service life and reduced risk of heat-induced pedal fade.

Key Features:

• Stress-flow forged aluminum construction for maximum strength-to-weight ratio
• Six-piston differential bore design for balanced pad wear
• Thermlock insulated pistons reduce heat transfer
• SRS bridge plates eliminate bridge wear and pad rattle while dampening vibrations
• Two-piece bleed screws on each end with internal fluid crossovers
• High-temperature square-faced bore seals for controlled piston retraction
• Starting weight of 4.9 pounds
• Compatible with full range of Wilwood pad compounds

The FNSL6R/ST caliper is designed for demanding racing applications and serious performance enthusiasts who require consistent, fade-resistant braking performance in the most extreme conditions. SRS bridge plates extend caliper service life by eliminating pad gouging while their spring-loaded action prevents pad rattle and reduces brake squeal.