Forged Superlite 4R Radial Mount Caliper – Part No: 120-13575-N
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Forged Superlite 4 Radial MT-Quick-Silver
Prod #: 120-13575-N
Price: $488.34

Forged Superlite 4 Radial MT-Quick-Silver - Product Summary
Caliper No: 120-13575-N
Wilwood Forged Superlite 4 Radial MT-Quick-Silver Caliper Wilwood Forged Superlite 4 Radial MT-Quick-Silver Caliper Zoom Image

Pistons
Piston Count 4
Piston Area (in²) 2.46
Piston Type Thermlock
Dust Boot No
Rotor Dimensions
Rotor Width (in) 0.81
Rotor Diameter(in) 14.00
Pad Dimensions
Pad Area (in²) 8.2
Pad Volume (in³) 4.9
Duty Rating & Material
Material Aluminum
Weight(Lbs) 5.2
Colors & Finish
Color Nickel
Finish Nickel Plate

Mounting
Mount Center(in) 5.98
Mount Position
Mount Side Universal
Mount Type Radial
UPC Number
UPC 889545003703
Product Documents
Product Data Sheet

Click To Download
Installation Instructions


WARNING: Cancer and Reproductive Harm
www.P65Warnings.ca.gov
Applicable to Brake Pads Only

120-13575-N - Product Description

Forged Superlite 4 Radial MT-Quick-Silver

FSL4R/ST-QS calipers provide the pad wear performance advantages of differential bore pistons with the option for ultimate heat protection using Thermlock® pistons in the ST models. Differential piston bores compensate for leading-edge mechanical loading and temperature variances across the pad face to reduce pad taper wear in sustained high temperature applications. Thermlock® pistons in the ST-QS models block heat transfer from the pads and reduce temperatures in the caliper, fluid, and seals by up to 25% over standard stainless steel pistons. Featuring Quick-Silver Nickel finish, these are the go-to calipers for all types sustained hard braking on dirt and asphalt ovals and a wide range of off-road, rally and road course applications.

The FSL4R has been redesigned with internal fluid ports that eliminate the external fluid cross-over tubes. The transfer tube has been replaced with two additional bleed screw assemblies which allow differential bore models to have a left hand and right hand orientation, but no leading or trailing configuration is required. The most noteworthy feature of all the FSL6R caliper models is the exceptional strength and reduced weight of the forging. With assembled weights just at 4.4 pounds, the caliper body design in itself is a product of computer generated solid modeling and stress analysis technology. Each caliper features closed end bridges with a radial transition down to the main body and piston bore housings. The elimination of machined steps and sharp shoulders in this critical area provides a measurable increase in overall body strength and resistance to deflection under load. Every FSL6R body is stress-flow forged from a premium grade aluminum alloy billet.



Product Specifications

Rotor Compatibility
Rotor Width (in) 0.81
Maximum Rotor Width (in) 0.90
Minimum Rotor Width (in) 0.75
Maximum Rotor Diameter(in) 14.00
Minimum Rotor Diameter(in) 11.75

Brake Pad Specifications
Brake Pad Type 1 7420
Brake Pad Type 2 N-A
Brake Pad Type 3 N-A
Total Pad Area (in²) 8.2
Total Pad Volume (in³) 4.9
Mount
Piston Specifications
Piston 1 Bore (in) 1.25
Piston 2 Bore (in) 1.25
Piston 3 Bore (in)
Total Piston Area (in²) 2.46

Mounting Specifications
Mount Type Radial
Mount Side Universal
Mount Center(in) 5.98
Mount Hole Size(in) 0.39
Mount Height(in) 1.63
Inlet Thread Size 1/8-27 NPT
Pad Dimensions & Part Numbers

Pad Dimensions for the Forged Superlite 4 Radial MT-Quick-Silver Pad Dimensions for the Forged Superlite 4 Radial MT-Quick-Silver Zoom Image


Mount Dimensions for the Forged Superlite 4 Radial MT-Quick-Silver Mount Dimensions for the Forged Superlite 4 Radial MT-Quick-Silver Zoom Image
Mount Dimensions & Part Numbers

Dimensions for the Forged Superlite 4 Radial MT-Quick-Silver Dimensions for the Forged Superlite 4 Radial MT-Quick-Silver Zoom Image

Additional Notes


Parts & Accessories

O-Ring Kit 130-2479
Replacement Dust Boot N-A
Replacement Piston 1 200-7555
Replacement Piston 2 200-7555
Replacement Piston 3 N-A
Replacement Piston 4 N-A
Cross-Over O-Ring Kit 130-10540
Bridge Bolt Kit 230-5976
Wear Plate L/H 300-5923
Wear Plate R/H 300-5922
Pad Retainer N-A
Bleed Screw Kit 220-0627
Self Bleeder Tube N-A
Cross-Over Tube N-A
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Version: 1.4.3 September 2020