Wilwood 120-16053 Forged Narrow Superlite Radial Mount Disc Brake Caliper - 6R

The Wilwood 120-16053 Forged Narrow Superlite 6R/ST (FNSL6R/ST) is a high-performance six-piston disc brake caliper engineered for demanding competition and high-performance street applications. Combining Wilwood's latest manufacturing technologies with advanced thermal management, this caliper delivers exceptional stopping power even in sustained extreme-heat environments.

Stress-Flow Forged Aluminum Construction:

The caliper body is stress-flow forged from premium-grade aluminum alloy billets, a process that re-aligns the metal's internal grain structure to follow the contour of the caliper body. Unlike conventional billet machining, this eliminates internal stress points and grain interruptions — resulting in a stronger, more durable caliper body. The result is a lightweight yet exceptionally rigid housing, starting at just 4.9 pounds, developed using computer-generated solid modeling and FEA (Finite Element Analysis) stress analysis.

Key Features:

• Six-Piston Differential Bore Design — Unique differential bore configuration provides balanced clamping force for even pad wear under sustained high-heat braking
• Thermlock Insulated Pistons — Wilwood's exclusive multi-part piston design creates a highly efficient thermal barrier, reducing heat transfer from pads to the caliper body, seals, and brake fluid — minimizing heat-induced pedal fade and extending component service life
• SRS Bridge Plates — Spring-loaded Shim Retention System (SRS) bridge plates eliminate bridge wear from pad gouging, prevent pad rattle, and dampen harmonic vibrations that contribute to brake squeal
• Dual End Bleed Screws — Two-piece bleed screws on each end of the caliper allow for easy bleeding and help protect against damage from track debris
• Internal Fluid Crossovers — Internal crossover passages protect brake fluid lines from external damage sources
• High-Temperature Square-Face Bore Seals — Provide maximum sealing area and deliver controlled, consistent piston retraction upon brake release
• Full Wilwood Pad Compound Compatibility — Compatible with the complete range of Wilwood brake pad compounds to match the heat range and response requirements of any competition or performance driving application
• Radial Mount Configuration — Right-hand (R/H) radial mount design for direct bolt-on installation in supported applications

The Wilwood FNSL6R/ST represents the pinnacle of the proven Superlite caliper series, purpose-built for racers and performance enthusiasts who demand reliable, fade-resistant braking across a broad range of track and high-performance street conditions.