Wilwood Piston Square O-Ring Seal Kit

The Wilwood Piston Square O-Ring Seal Kit line offers replacement square-ring piston seals (also called caliper square seals or caliper rebuild O-rings) for Wilwood disc brake calipers. These seals are made for periodic caliper maintenance. They help prevent fluid leaks and keep the pistons moving freely.

Key Features:

• Square-ring cross section: The profile is made specifically for Wilwood caliper piston grooves, so generic round O-rings are not a substitute.
• Rubber elastomer construction: The seals are made to hold hydraulic pressure and retain brake fluid in the caliper.
• Brake fluid compatibility: Wilwood's square rings are intended for use with DOT 3, 4 and 5 brake fluids.
• Maintenance-oriented design: Regular seal replacement helps keep Wilwood calipers sealing and performing consistently.
• Wilwood quality: Wilwood designs and builds high-performance brake components for street, racing and custom applications.

Replacing worn piston seals is a basic part of rebuilding a Wilwood brake caliper. Choose the kit that matches the piston size and caliper configuration in your Wilwood caliper.