Wilwood Caliper-Forged Superlite 4R-ST-R/H - Nickel 1.25/1.25in Pistons 0.81in Disc

Wilwood is well-known for making serious braking components for performance vehicles. This Forged Superlite 4R-ST-R/H caliper is a prime example, built for drivers who push their cars hard on dirt and asphalt ovals, off-road, rally, or road courses. It's designed to handle the heat and wear that comes with sustained, high-performance braking.

What makes this caliper stand out is its use of differential bore pistons. This means the pistons aren't all the same size, which helps manage the leading edge of the brake pad and temperature differences across the pad face. This design works to reduce taper wear, keeping your pads wearing more evenly over time, especially when things get hot. The 'ST' in the model name signifies Thermlock pistons, which are a notable upgrade. These pistons actively 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 is crucial for consistent braking performance under extreme conditions.

Finished in a durable Quick-Silver Nickel, these calipers are a solid option for anyone looking to upgrade their braking system for demanding applications. They are designed to work with 0.81-inch thick rotors and feature 1.25-inch pistons.