Wilwood 120-11136 FSLI Forged Superlite Brake Caliper - 6-Piston

The Wilwood FSLI (Forged Superlite Internal) brake caliper represents the pinnacle of performance braking technology for short track, late model, modified, and open wheel racing applications. This caliper also excels in road racing, off-road, rally, and high-performance street driving environments.

Stress-Flow Forged Construction:

Each FSLI 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 stresses and grain interruptions that occur in traditional machined billet construction, resulting in exceptional strength and rigidity with minimal deflection under load.

Advanced FSL Body Design:

Developed using computer-generated solid modeling and stress analysis technology, the FSL body features closed-end bridges with radial transitions to the piston housings. This design eliminates machined steps and sharp shoulders in critical stress areas, providing measurable increases in overall body strength and resistance to deflection. Center bridge bolts replace traditional cotter pins for additional structural support and quick pad access with positive retention.

Key Features:

• Replaceable SRS stainless steel bridge plates eliminate bridge wear from pad gouging and extend caliper service life
• Spring-loading action of SRS plates eliminates pad rattle and dampens vibration harmonics that cause brake squeal
• High-temperature square-faced O-ring seals provide positive sealing, controlled piston retraction, and long service life in high-heat conditions
• Stainless steel pistons resist corrosion and retard heat transfer from brake pads
• Two-piece bleed screw assemblies for reliable, long-lasting service and easy replacement
• Direct replacement for all Wilwood Superlite and similar competitive calipers with 3.50" centered mounting tabs
• Compatible with 7420-type bridge bolt brake pads used in all Superlite 6-piston calipers

Available Configurations:

FSLI calipers are available in multiple piston sizes including 1.75", 1.62", 1.38", 1.25", and 1.12" to accommodate .81", 1.10", and 1.25" rotor widths. The full range of Wilwood PolyMatrix pad compounds is available to match brake response and heat range to any specific application.

Extensive testing has proven the FSLI caliper delivers superior stopping power with reduced pedal travel, providing measurable performance advantages in demanding racing and high-performance applications.