Wilwood Piston Thermlock - 1.88in x 1.05in

This is a Wilwood Piston Thermlock, part number 200-7550. It's a small but important component used in caliper rebuilds, specifically designed to help manage heat within your braking system. When your brakes work hard, especially during spirited driving or heavy braking, heat builds up. This thermlock helps to dissipate some of that heat away from the caliper piston and seal, which can contribute to more consistent brake performance and extend the life of your caliper components.

Wilwood is known for making solid brake components, and this thermlock is no different. It's a well-made piece designed to fit specific Wilwood caliper pistons, measuring 1.88 inches in diameter and 1.05 inches in height. Installing these during a caliper rebuild is a good practice to ensure your brakes operate as intended under demanding conditions. It's a simple addition that can make a notable difference in how your brakes handle heat.