Wilwood GM Metric Race Caliper 2.50" Piston 1.040" Rotor 5.460" Mount WIL120-13900

If you're running in IMCA-sanctioned competition, you need a caliper that meets tech inspections while delivering consistent, repeatable braking performance under race conditions. The Wilwood GM Metric Race Caliper combines proven cast iron construction with a large-diameter stainless steel piston to give you the stopping power and durability required across Modified, Stock Car, Hobby Stock, and Sport Mod classes. This is a purpose-built racing component—not a street brake adapted for the track—engineered to handle the thermal cycling and repeated hard stops that define competitive racing.

Technical Specifications:

• Material: Cast iron
• Piston diameter: 2.50"
• Piston material: Stainless steel
• Rotor compatibility: 11.75" max diameter
• Rotor thickness: 1.040" max
• Mount type: Floating
• Mount center: 5.460"
• IMCA approved: Yes
• MPN: 120-13900