Brembo E9X M3 / E82 1M Race Big Brake Kit - 345x28mm 2-Piece RearProduct Description: (F) 4 Piston Forged Monobloc Calipers 345x28mm (13. 6") 2 Piece Discs Complete Front Axle Set Pre Assembled All Necessary Hardware Included INTENDED USE Street Track Race ___ ___ ___ ___ ___ CALIPER Body: Forged Monobloc Piston Configuration: 4 Piston Piston Design And Insert Type: Inner Pressure Seal Stainless Steel Insert DISC Type: Type 3 Slotted Semi Float Material Finish: Advanced High Carbon Alloy Unplated Diameter: 345mm