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Product details
This GP-series service pack contains four square piston seals with a listed 1.250-inch inside diameter. Wilwood documents the kit for the assigned GP calipers, including GP300 and GP310 in FL186. It is a caliper-level replacement part; vehicle fitment depends on the exact caliper already installed. Bill Wood founded Wilwood Engineering in 1977; the company is based in Camarillo, California. Wilwood designs and manufactures disc brake systems and components, from calipers and brake rotors to master cylinders, valves, fittings and brake lines, for motorsport, street-performance and specialized applications; selection depends on the complete brake system.
Technical Details
- Manufacturer part number: 130-3602
- Service component: Caliper Square Ring Kit
- Seal profile: Square-Ring
- Manufacturer-listed seal inside diameters: 1.250 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
Check the GP caliper model and its seal-kit reference before disassembly, rather than selecting by motorcycle year alone. Match the 0.099-inch section and square groove profile. Use the complete brake system’s required fluid specification and inspect pistons, crossover sealing and other service items separately.
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.
