Wilwood Caliper Type III Ano Left XRZ4R 1.88in/1.75in Piston 1.25in Disc

Wilwood is well-known for making high-performance braking components, and this XRZ4R caliper is a prime example of their focus on track-ready systems. This is the left-side caliper, designed for serious braking applications where consistent performance under heavy load is critical. It features a unique combination of piston sizes – a larger 1.88-inch piston paired with a 1.75-inch piston – which helps to balance hydraulic pressure and provide strong, even clamping force across the brake pad. This setup is specifically tuned for use with a 1.25-inch thick disc, ensuring optimal engagement and heat dissipation.

The caliper body itself is constructed from forged aluminum, a material chosen for its excellent strength-to-weight ratio. This not only keeps unsprung mass down, which is important for handling, but also provides a solid foundation for the internal components. The Type III anodized finish offers improved durability and corrosion resistance, helping the caliper stand up to the harsh conditions found during spirited driving or track use. Inside, you'll find high-temperature seals and robust internal hardware designed to withstand the extreme temperatures generated during braking events. This caliper is built to work as part of a complete system, and its design prioritizes responsiveness and fade resistance.

When installing a caliper like this, it's important to ensure you have the correct brake lines and mounting hardware for your specific application, as these are typically sold separately. Proper bleeding of the brake system after installation is also crucial for achieving the intended performance and feel. This caliper is a solid choice for builders looking to significantly upgrade their vehicle's braking capability for demanding use.