Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The four-piece mixed square-ring kit contains piston seals with listed IDs of 1.620 and 1.380 inches. The rings use Wilwood’s 0.099-inch section and manufacturer material code 210M. This is the assigned piston-seal pack, which must be distinguished from dust-seal combination kits using similar dimensions. Founded in 1977 by Bill Wood, Wilwood Engineering is based in Camarillo, California. Its disc brake systems and components serve motorsport, street-performance and specialized applications. Calipers, brake rotors, master cylinders, valves, fittings and brake lines are among its products, selected according to the complete brake system’s requirements.
Technical Details
- Manufacturer part number: 130-9873
- Service component: Caliper Square Ring Kit
- Seal profile: Square-Ring
- Manufacturer-listed seal inside diameters: 1.620 / 1.380 inches
- Listed seal thickness: 0.099 inch
- Manufacturer material code: 210M
- 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
Confirm the exact caliper’s service-kit reference before ordering, then compare the two groove sizes and square profile. Keep each ring assigned to its intended piston location. Inspect the remaining rubber components, piston surfaces and housing condition separately rather than treating the four seals as a complete rebuild assembly.
For help identifying the correct brake component, provide the caliper markings and installation dimensions. PMB Performance has over 20 years of experience with parts and brake-system details.
