Specifications
- Brand
- Wilwood
- Part #
- 120-13263
- UPC
- 889545085754

Wilwood ST FSL4R Caliper 1.88/1.75 1.25 Rotor
$468.61
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Wilwood ST FSL4R Caliper 1.88/1.75 1.25 Rotor. This caliper uses Thermlock pistons to reduce heat transfer for improved braking performance.
Key Features
- Fits various performance applications including dirt and asphalt ovals, off-road, rally, and road course.
- Features differential bore pistons (1.88-inch and 1.75-inch) to reduce pad taper wear.
- ST models include Thermlock® pistons that block heat transfer, reducing caliper and fluid temperatures by up to 25%.
- Wear-resistant Type III hard anodize finish for durability.
- Designed for sustained hard braking applications.
Product Details
This is the Wilwood ST FSL4R caliper, designed for serious braking performance. It features differential bore pistons, meaning the pistons are different sizes (1.88-inch and 1.75-inch) to help manage pad wear and temperature across the pad surface. This is especially helpful during sustained hard braking, like on a race track or during aggressive off-road driving.
What sets the ST model apart are the Thermlock® pistons. These are built to block heat transfer from the brake pads, keeping the caliper, brake fluid, and seals cooler by up to 25% compared to standard stainless steel pistons. This improved heat management means more consistent braking power when you need it most. The caliper also has a tough Type III hard anodize finish, which holds up well against wear and tear in demanding conditions, making it a popular choice for oval track racing, rally, and road course applications.
Specifications
- Brand
- Wilwood
- Manufacturer Part #
- 120-13263
- UPC
- 889545085754
Frequently Asked Questions
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Wilwood ST FSL4R Caliper 1.88/1.75 1.25 Rotor
