Using proprietary Speed Flow™ technology, Dart has developed more efficient port designs with improved velocity and flow capabilities. The combustion chambers and ports have been redesigned for greater breathing characteristics and more controllable combustion. Casting walls are cleaner and more consistent, resulting in better control over flow and heat.

More From This Category

AFR 23° SBC Cylinder Head 130cc porters casting Straight Plug Heads w/heat riser,  63cc chambers, no porting, parts or valve job

AFR 23° SBC Cylinder Head 130cc porters casting Straight Plug Heads w/heat riser, 63cc chambers, no porting, parts or valve job

$2,260.66

AFR Cylinder Head, 23° SBC 200cc Enforcer As Cast Angle Plug 69cc chamber - Ready for Assembly

AFR Cylinder Head, 23° SBC 200cc Enforcer As Cast Angle Plug 69cc chamber - Ready for Assembly

$932.14