Proflow Cylinder Heads, SuperMax 210, Aluminum, Assembled, 64cc Chamber, Angle Plug, 210cc Intake Runner, SBC Chevrolet, 600HP, Pair

Proflow does not sacrifice quality for a low price--you get both with our aluminium cylinder heads. The lightweight heads are cast from A-356 aluminium alloy with a large choice of Engine, for SB & BB Chevrolet, LS Chev Holden Ford SB 289-351W, 302,351 Cleveland 2V & 3V & BB FE, and Chrysler SB & BB, phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They're also end-milled and drilled for accessories. The fully assembled heads have stainless steel valves, High Performance valve springs, 7 degree valve locks, rocker arm studs, and guideplates. These heads are capable of producing over 600 HP straight out of the box! SPECIFICATIONS Combustion Chamber 66 cc Intake Port Volume 210 cc Intake Port Dimensions 2.21” (H) x 1.30” (W) Exhaust Port Volume 72 cc Exhaust Port Dimensions 1.42” (H) x 1.53” (W) Spark Plug Location Angled Intake Valve Diameter 2.08” Exhaust Valve Diameter 1.60” Valve Stem Diameter 8 mm Valve Spring Pocket ID 1.56” Valve Guide OD 0.502” (0.560” at base) Maximum Valve Lift 0.620” Rocker Stud Thread Size 7/16”-24 Valve Angle 23° Deck Thickness 0.750” Installed Spring Height 2.00” @ 195lbs