Wilwood Superlite Front Big Brake Kits 1969-1974 Porsche 911 3.00 MT (GT Slotted 12.19" Rotor)Wilwood engineered these big brake kits around motorsports proven Superlite calipers for the classic 1969 89 Porsche 911. Larger 310mm (12. 19) iron alloy rotors with forged aluminum mounting hats and Wilwood brackets produce greater brake torque and less fade, while weighing substantially less than OE. These rigid, forged billet aluminum four piston calipers upgradethe stock 911 to a spec similar to the 1974 RS or 930 turbo, with the added advantage