DART 18 DEGREE BBC OVAL PORT INTAKE RUNNER. FULLY CNC PORTED HEAD WITH SONNY'S BOWL, CHAMBER AND VALVE SEAT MACHINING MODIFICATIONS WILL RESULT AS FOLLOWING:

On a SF600 bench @ .800 lift intake runner will flow 437 cfm with a 2.350 Manley stainless valve @ .800 lift exhaust runner will flow 339 cfm with a 1.860 Manley stainless valve.

feature list

•   • Heart shaped combustion chambers

  • Interlocking ductile iron valve seats

  • Exhaust ports raised .300 to improve airflow over short side radius

  This head is excellent for 550-632 cu. in. BBC engines for drag racing and 580-650 cu. in. boat engines and most any class that allows a 18 degree intake valve inclined (roll over) angle in a BBC application.

Race ready castings   $4,645.00

Race ready heads with Manley stainless steel valves, Vasco jet springs, titanium retainers, spring cups, hardened locks and valve seals $5,725.00