Round O-Ring Kit - 2.38

The Round O-Ring Kit - 2.38 is a precision brake caliper rebuild component designed for Wilwood high-performance braking systems. This kit supplies the critical elastomer seals required to restore caliper function and hydraulic integrity on platforms using 2.38-inch Wilwood pistons. Whether you're maintaining competition brake systems, law enforcement fleet vehicles, or tactical training rigs, this rebuild kit is essential maintenance for stopping power reliability and safety.

The Round O-Ring Kit contains precision-molded rubber seals engineered to match OEM specifications for Wilwood 2.38-inch piston calipers. These o-rings create the dynamic and static seals that prevent brake fluid leakage and maintain consistent hydraulic pressure under high-heat, high-demand conditions—critical in tactical vehicles, duty rigs, and performance platforms where brake fade can compromise mission readiness. The 2.38-inch sizing ensures exact fitment; improper seal dimensions result in weeping, loss of braking authority, and potential system failure. Compact and lightweight at 0.05 lbs, the complete kit stores easily in maintenance kits or range bags for field rebuilds.

Law enforcement mechanics, armored vehicle maintenance teams, and tactical training facilities benefit most from stocking this kit for scheduled caliper maintenance. Installation requires basic brake system knowledge and standard tools; most technicians can complete a rebuild in under an hour. Compatibility is strict to Wilwood 2.38-inch piston systems—verify your caliper bore diameter before ordering. This rebuild kit extends caliper lifespan, restores factory braking performance, and is far more cost-effective than full caliper replacement for agencies and operators maintaining high-duty-cycle brake systems.