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Billet Aluminum Calipers Six Piston   SERIES 631 Six Piston Our 631 Series calipers are a 6 piston design and weigh 5.2 pounds each. Piston diameters are 1.375” , 1.5” and 1.74”. Rotor diameter can range from 9” to 14”. Specify your rotor thickness. Caliper mounting bracket hole spacing is 6” and the brake pad size is 6”.   Strongest available but still light weight. Machined from billet alumimum. Internal crossoever passage - No external tube assemblies to break. Uses grade 8 bolt to hold pads, not a clevis pin. Stainless steel pistons. 631R Caliper - Right 631L Caliper - Left 956 O-Ring kit 960-S Piston 964 Piston 961-L Piston 1431 Bleeder fitting 1432 Bleeder screw 1433 Pad bolt and nut     CNC, INC.   1221 West Morena Blvd.   San Diego, CA  92110 619-275-1663     619-275-0729 FAX