So for instance if a person fitted a Silvertop oil pump over a Blacktop engine then the Blacktop’s timing belt pulley would wish to get rotated 50 % a tooth additional relative for the protrusion about the Silvertop oil pump. Pictured down below may be the Blacktop pulley placed on https://4age-20v-blacktop47036.blogocial.com/little-known-facts-about-4age-20v-itb-67292398