We designed a backing plate that completely mounts up to the Silvertop and Blacktop 4AG and permits the... Regardless that the Blacktop head contains a extra open up combustion chamber (see “Head combustion- chambers”) it nevertheless has a higher static compression ratio (see “compression ratio”), this is only as a https://4age20vforsale35789.blogrenanda.com/46550171/4age-20v-blacktop-for-dummies