Brembo E39 M3 GT-S Big Brake Kit - 380x32mm 2-Piece FrontProduct Description: (F) 6 Piston Cast Monobloc Calipers 380x32mm (15'') 2 Piece Discs Complete Axle Set Pre Assembled All Necessary Hardware Included INTENDED USE Street Track Race ___ ___ ___ ___ ___ CALIPER Body: Cast Monobloc Radial Mount Piston Configuration: 6 Piston Piston Design And Insert Type: Inner Pressure Seal Recessed Dust Boot Stainless Steel Insert DISC Type: Cross Drilled, Type 1 Slotted, or Type 3 Slotted Material Finish: Advanced