Square O-Ring Kit 1.62/1.12/1.12

The Square O-Ring Kit 1.62/1.12/1.12 (WIL130-5972) from Wilwood is a precision brake caliper rebuild kit engineered to restore or maintain hydraulic integrity in high-performance braking systems. Whether you're maintaining law enforcement pursuit vehicles, military tactical transport, or duty-grade automotive platforms, this o-ring assortment addresses the critical sealing components that prevent fluid loss and pressure degradation under sustained braking demand. Brake system reliability is non-negotiable in duty applications where stopping performance directly affects officer and public safety.

This rebuild kit contains three distinct square o-ring sizes—1.62 inches, 1.12 inches, and 1.12 inches—designed to seal piston chambers within Wilwood brake calipers. Square-profile o-rings provide superior sealing geometry compared to standard round profiles, resisting extrusion under high-pressure cycling and maintaining consistent contact against caliper bore walls. Constructed from high-grade rubber compounds, these seals withstand the thermal cycling inherent to duty brake systems while resisting degradation from DOT 3, 4, and 5.1 brake fluid exposure. The kit's compact dimensions (5.25 x 0.65 x 6.65 inches) and minimal weight (0.06 lbs) make field replacement and transport practical during maintenance operations.

Technicians and mechanics responsible for Wilwood brake caliper maintenance will recognize this kit as essential service inventory, particularly for vehicles subject to high-mileage duty cycles or frequent towing loads. Installation requires basic caliper removal and disassembly; replacement follows manufacturer procedures outlined in Wilwood's caliper service documentation. This o-ring set is compatible with Wilwood piston-equipped calipers matching these seal cavity dimensions, making verification against your specific caliper model critical before ordering. Stocking this rebuild kit ensures rapid brake system restoration without extended downtime.