Wilwood Piston Thermlock - 1.62in x 1.05in

This Wilwood Piston Thermlock measures 1.62 inches in diameter and 1.05 inches in height, a specific size designed to fit within certain Wilwood caliper pistons. Its primary job is to act as a thermal barrier, helping to keep heat from the braking surface from transferring directly into the brake fluid. By reducing heat transfer, it helps prevent brake fluid from boiling, which can lead to a spongy pedal and reduced braking performance, especially during extended or hard braking events.

Crafted from a specialized material, this thermlock is built to withstand the high temperatures generated during braking. It's a small but important component for maintaining consistent brake feel and performance. When you're rebuilding a Wilwood caliper, ensuring these small but critical pieces are in place is key to a reliable brake system. It fits directly into the piston, making it a straightforward part of a caliper rebuild process.