Fitment questions?
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Product details
The GM round-ring kit contains four piston O-rings at the listed 2.380-inch inside diameter. A 0.139-inch section distinguishes the round seal from the square-profile kit carrying a similar size label. The manufacturer identifies the compound as 210A without specifying a broader universal caliper application. Based in Camarillo, California, Wilwood Engineering was founded by Bill Wood in 1977. The manufacturer produces disc brake systems and components for motorsport, street-performance and specialized applications, with a range covering calipers, brake rotors, master cylinders, valves, fittings and brake lines. Individual components are chosen to suit the complete brake system.
Technical Details
- Manufacturer part number: 130-4956
- Service component: Caliper O-Ring Kit
- Seal profile: O-Ring
- Manufacturer-listed seal inside diameters: 2.380 inches
- Listed seal thickness: 0.139 inch
- Manufacturer material code: 210A
- Pack quantity: 4 Pack
- Seal fluid compatibility: DOT 3, DOT 4 and DOT 5 as specified for these seals. Follow the complete caliper and vehicle fluid requirements; do not mix silicone DOT 5 with DOT 3, DOT 4 or DOT 5.1.
Fitment & Compatibility
Check the caliper’s assigned service kit and the actual groove shape before replacement. Match cross-section and ID together, and do not substitute a square seal using size alone. Inspect the hydraulic piston and bore and assess the rest of the caliper’s rubber parts and hardware separately.
With over 20 years of parts experience, PMB Performance can help compare this component with your existing brake assembly. Include its caliper reference and any conversion-kit information.
