While the Blacktop head features a far more open up combustion chamber (see “Head combustion- chambers”) it however has a greater static compression ratio (see “compression ratio”), this is only because of the piston design and style. The Silvertop piston features a quite compact dome with two deeply angled exhaust https://4age20vitb16936.tkzblog.com/31217372/details-fiction-and-toyota-4age-blacktop-engine-for-sale