This rear brake kit for 68-72 Chevelle and El Camino vehicles is designed to bolt directly to a 10 or 12-bolt rear end and features red Wilwood D52 2 piston calipers, 11" and gas-slotted rotors, brake pads, stainless braided hoses and all the necessary mounting hardware for installation.The WilwoodD52 calipers are a feature a 2-piston design with forged, billet aluminum bodies, stainless steel pistons, and competition style high-temperature seals.