Wilwood 120-11128-BK FSLI Superlite Brake Caliper Black Powder Coat - 6-Piston

The Wilwood FSLI Superlite 6-piston brake caliper represents a significant advancement in racing brake technology, combining stress-flow forged construction with proven performance features. This caliper is widely used in short track, late model, modified, open wheel, road race, off-road, rally, and sport driving applications where maximum stopping power and minimal pedal travel are essential.

Stress-Flow Forged Construction:

Each caliper body is stress-flow forged from premium grade aluminum alloy billets. This advanced manufacturing process re-aligns the metal's internal grain structure to flow within the contour of the caliper body, eliminating the stresses and grain interruptions that occur with traditional billet machining. The result is superior strength and resistance to deflection under heavy braking loads.

Advanced FSL Body Design:

• Computer-generated solid modeling and stress analysis optimized design
• Closed end bridges with radial transitions to piston housings
• Eliminates machined steps and sharp shoulders in critical stress areas
• Center bridge bolts replace cotter pins for improved pad retention and quick access
• Proven to deliver better stopping power with reduced pedal travel

Premium Performance Features:

• Replaceable SRS stainless steel bridge plates eliminate pad gouging and extend caliper life
• Spring-loading action of SRS plates eliminates pad rattle and reduces brake squeal
• High-temperature square-faced O-ring seals for positive sealing and controlled piston retraction
• Stainless steel pistons resist corrosion and reduce heat transfer from brake pads
• Two-piece bleed screw assemblies for reliable, long-lasting service
• Black powder coat finish for durability and corrosion resistance

Compatibility and Specifications:

FSLI calipers are direct replacements for all Wilwood Superlite and similar competitive calipers with 3.50" centered mounting tabs. Available in multiple piston sizes including 1.75", 1.62", 1.38", 1.25", and 1.12" for rotor widths of .81", 1.10", and 1.25". Uses standard 7420 type bridge bolt brake pads compatible with Wilwood's full range of PolyMatrix pad compounds.