i have a rebuilt fully polished and ported supercaharger.... not an millmeter of the interier has been missed stock pulley but i molded the port job after a stage one ZZperformance port job. this allows for low end air flow velocity gains as well as better flow charatristics all together. Will attached pictures tonight, exterior is still rough but the real gains are on the inside. Rotors are in great shape. Lookin to get $500 out of it.