Although the Blacktop head incorporates a much more 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 piston structure. The Silvertop piston contains a really compact dome with two deeply angled exhaust flycuts, two https://4age20vblacktopforsale74948.bloggazzo.com/30657655/little-known-facts-about-4age-20v-itb