vPRO20/BBC
450cc
96cc chamber
2.400/1.800
4.600 fixture
2.125 pipe
.200 164/123
.300 232/171
.400 310/214
.500 380/255
.600 435/296
.700 475/316
.800 489/330
.900 492/339
1.00 496/344

Manley Stainless valves w/50º seats Custom Titanium valves will show higher flow rates.

Dart's conventional asymmetrical port design, and featuring a 20° rolled valve angle with redesigned shallow combustion chambers. These heads are ideal for maximum effort naturally aspirated, big boost forced induction, or nitrous applications.

490cfm at .800!

Dart 20's fully CNC, Manley Stainless Valves, PAC 1248 triple springs, Manley Titanium Retainers, locks and locators $5,795