Wilwood 200-7551 – 1.75" Thermlock Brake Caliper Piston

Wilwood 200-7551 – 1.75" Thermlock® Brake Caliper Piston

The Wilwood 200-7551 Thermlock® Piston delivers industry-leading thermal protection for high-performance racing brake systems. Wilwood’s exclusive multi-part Thermlock® design combines a stainless steel heat shield with a coated aluminum shell, significantly reducing heat transfer from the brake pads into the caliper body, seals, and brake fluid.

By lowering heat transfer by at least 25%, Thermlock® pistons help prevent seal crystallization, localized fluid boiling, and caliper bore distortion, resulting in more consistent braking performance and extended caliper service life under sustained high-temperature conditions.

Features & Benefits

• Thermlock® thermal barrier technology – Reduces heat transfer by at least 25%
• Stainless steel heat shield – Blocks radiant and conductive heat
• Coated aluminum shell – Lightweight and race-durable
• Protects seals & fluid – Minimizes boiling and seal degradation
• Improves caliper longevity – Reduces piston and bore distortion
• Race-proven design – Ideal for sustained high-heat braking applications

Product Specifications

• Part Number: 200-7551
• Piston Type: Thermlock®
• Material: Aluminum / Stainless Steel
• Outside Diameter: 1.75"
• Length: 1.050"
• Weight: 0.260 oz