O-Ring Kit 1.62in Square Seal 4pk

The O-Ring Kit 1.62in Square Seal 4pk by Wilwood is an essential brake system rebuild component designed for mechanics and performance enthusiasts maintaining Wilwood brake calipers. This four-pack of precision-engineered square seals restores caliper integrity after inspection, overhaul, or routine maintenance, preventing fluid leakage and ensuring consistent hydraulic pressure delivery to your braking system. Whether you're servicing track-ready performance brakes or keeping street machines road-worthy, these OEM-specification o-rings are the reliable choice for brake system reliability.

Built to exact Wilwood engineering specifications, the 1.62-inch square seal design provides superior sealing geometry compared to round o-rings, creating a larger contact surface against caliper bore walls and resisting extrusion under high brake pressures. The rubber compound is formulated to withstand the thermal cycling, moisture exposure, and hydraulic fluid compatibility demands of modern brake systems, whether street driven or competition-oriented. Each seal in this 4pk kit maintains dimensional consistency to guarantee proper fit and optimal caliper piston function without leakage or binding.

Mechanics rebuilding Wilwood single-piston or multi-piston calipers will appreciate having multiple seals on hand for a complete rebuild or to stock spares for future service intervals. The compact 4pk format fits easily in any shop tool kit or emergency brake repair bag, making it ideal for track events, autocross paddocks, or mobile service calls. Always replace o-rings during caliper rebuilds to maintain original sealing performance and prevent premature brake fluid contamination or loss of hydraulic pressure.