# Wilwood ST FSL4R Caliper 1.88/1.75 1.25 Rotor

FSL4R/ST 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 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 a wear resistant Type III hard 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.

## Details

- **Price:** 676.83 CAD
- **Vendor:** Wilwood
- **Type:** Brake Calipers - Perf

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 676.83 CAD | In stock |

## Images

- Photo - Primary

---

> Source: [Standard Auto Part](https://www.standardautopart.com/products/wilwood-st-fsl4r-caliper-1-88-1-75-1-25-rotor)
> Updated: 2026-08-18