Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The one-inch-ID square-ring pack contains four piston seals for the manufacturer-assigned caliper service arrangements. A 0.099-inch square section and material code 210M identify the ring specification. This is the piston-only pack, distinct from a combination kit that supplies separate dust seals as well. 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: 130-4320
- Service component: Caliper Square Ring Kit
- Seal profile: Square-Ring
- Manufacturer-listed seal inside diameters: 1.000 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 replacement-parts listing and the required groove profile. Wilwood documents this kit in the matching PS-1, Powerlite and DynaPro service tables, but the complete caliper reference remains the selection check. Inspect the remaining rubber parts, pistons and hardware and establish quantity from the actual repair.
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.
