Though the Blacktop head encompasses a extra open up combustion chamber (see “Head combustion- chambers”) it even now has a higher static compression ratio (see “compression ratio”), this is solely as a result of piston layout. The Silvertop piston features a really tiny dome with two deeply angled exhaust flycuts, https://4age-engine-sale13346.diowebhost.com/86442654/about-4age-20v-blacktop-for-sale