Wilwood 120-15988 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, engineered for extreme racing and high-temperature braking applications. This six-piston caliper combines advanced materials, precision engineering, and innovative thermal management to deliver exceptional stopping power and durability.

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 forging method eliminates internal stresses and grain interruptions that occur with conventional machining, creating an extraordinarily strong and lightweight caliper that starts at just 4.9 pounds. The design is optimized through computer-generated solid modeling and FEA stress analysis for maximum strength-to-weight ratio.

Six-Piston Differential Bore Design:

The unique six-piston configuration utilizes differential bore sizing to provide balanced pad loading and promote even wear throughout sustained high-heat racing conditions. This design ensures consistent brake feel and performance throughout extended track sessions.

Thermlock Insulated Pistons:

Wilwood's exclusive Thermlock pistons feature a multi-part construction that creates a highly efficient thermal barrier between the brake pads and caliper components. This advanced design significantly reduces heat transfer to the caliper body, seals, and brake fluid, maintaining cooler operating temperatures that extend component life and reduce the risk of heat-induced brake fade.

Key Features:

• Stress-flow forged aluminum body weighing just 4.9 pounds
• Six-piston differential bore configuration for balanced pad wear
• Thermlock insulated pistons reduce heat transfer and fade
• SRS (Self-Regenerating Surface) bridge plates eliminate pad gouging and wear
• Spring-loaded SRS plates prevent pad rattle and reduce brake squeal
• Two-piece bleed screws on each end for easy bleeding
• Internal fluid crossovers protected from track debris
• High-temperature square-faced bore seals provide maximum sealing area
• Controlled piston retraction for consistent pad release
• Compatible with full range of Wilwood performance pad compounds

The FNSL6R/ST caliper is designed for serious competition and sports driving applications where maximum performance, reliability, and thermal management are critical. Its combination of lightweight construction, thermal protection, and proven six-piston design makes it an ideal choice for road racing, road course, and high-performance street applications.