Here is our latest brake system. Part # ST13X11-4P-ALUM. It features a 13" x 1.1" 1pc directional curved vane rotor, 4 piston forged aluminum caliper in either bright red or gloss black powder coat. Direct bolt on to 65-73 DRUM spindles and will fit under some 16" and most larger wheels. Please visit our website for more information and to download a wheel fitment template.