The Blacktop has an inner condition with the manifold in a more of a heart form as opposed to Silvertop’s circular inlets (see “Throttles”). The Blacktop inlets at the head facet also are wider to permit for the greater inlet ports in the head. Make sure you see “Throttles”, “Head https://arthuraeeca.blogs100.com/35132112/the-5-second-trick-for-4age-20v