Though the Blacktop head features a additional open up combustion chamber (see “Head combustion- chambers”) it continue to has the next static compression ratio (see “compression ratio”), this is purely due to the piston style and design. The Silvertop piston contains a very compact dome with two deeply angled exhaust https://4ageblacktopengineforsale37036.blazingblog.com/28924970/top-latest-five-4age-20v-turbo-engine-for-sale-urban-news