Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The larger GM square-ring kit supplies four piston seals at the listed 2.750-inch inside diameter. It uses a 0.134-inch section rather than the dimensions of the round-profile GM kit. Matching the caliper’s square groove is as important as checking the size shown in the service listing. 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: 130-2660
- Service component: Caliper Square Ring Kit
- Seal profile: Square-Ring
- Manufacturer-listed seal inside diameters: 2.750 inches
- Listed seal thickness: 0.134 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
Identify the exact caliper and assigned seal reference before disassembly. Compare the full ring profile and section, and assess the piston and bore for damage while servicing the unit. The four-piece quantity describes the pack contents; it does not promise complete axle coverage or every component required for an overhaul.
PMB Performance brings over 20 years of brake and parts experience to selection questions. Send the existing caliper reference and brake-package details for help checking compatibility.
