Forged Superlite 4R Radial Mount Caliper – Part No: 120-13575
Call (805) 388-1188
Forged Superlite 4 Radial Mount
Prod #: 120-13575
Price: $460.09

Forged Superlite 4 Radial Mount - Product Summary
Caliper No: 120-13575
Wilwood Forged Superlite 4 Radial Mount Caliper Wilwood Forged Superlite 4 Radial Mount Caliper Zoom Image

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 Ano
Finish Type III Ano

Mount Center(in) 5.98
Mount Position
Mount Side Universal
Mount Type Radial
UPC Number
UPC 889545089899
Product Documents
Product Data Sheet

Click To Download
Installation Instructions

WARNING: Cancer and Reproductive Harm
Applicable to Brake Pads Only

120-13575 - Product Description

Forged Superlite 4 Radial Mount

FSL4R/ST calipers provide performance advantages of Thermlock® pistons for ultimate heat protection. Thermlock® pistons used in the ST 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 Type III Anodize 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
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 Mount Pad Dimensions for the Forged Superlite 4 Radial Mount Zoom Image

Mount Dimensions for the Forged Superlite 4 Radial Mount Mount Dimensions for the Forged Superlite 4 Radial Mount Zoom Image
Mount Dimensions & Part Numbers

Dimensions for the Forged Superlite 4 Radial Mount Dimensions for the Forged Superlite 4 Radial Mount 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
Products commonly used with this item:

More Details
More Details
More Details
More Details

Additional related products:

More Details

All images shown are for illustrative purposes only. Actual product received may be different than what is portrayed on the web site.
Wilwood makes every effort to maintain our web site to ensure the accuracy of prices and product information. However, product information and prices are subject to change without notice. Please call (805) 388-1188 before ordering to verify current prices and product information.
     Copyright ©2021 Wilwood Engineering, Inc. - All Rights Reserved     
Version: 3.05 June 24, 2022