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The Wilwood O-ring kit includes 1.38" round piston seals in a four-piece pack for caliper service. Intended for caliper rebuilds and seal replacement, these round seals match Wilwood-specified dimensions and are used to renew piston sealing surfaces. Install them during brake servicing to help maintain reliable hydraulic operation and correct caliper performance.
Wilwood O-Ring Kit - 1.38in Round Seal - 4 pk.
