Cylinder Heads, Aluminium, Bare, 64cc Chamber, Straight Plug, 180cc Intake Runner, SB Chevrolet, Pair - PFEAHC18064SPBE

Part Number: PFEAHC18064SPBE

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. They have 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. Perfect for your Mild or High performance Hot Rod. SPECIFICATIONS Combustion Chamber 64 cc Intake Port Volume 180 cc Intake Port Dimensions 2.00” (H) x 1.20” (W) Exhaust Port Volume 70 cc Exhaust Port Dimensions 1.450” (H) x 1.550” (W) Spark Plug Location Straight Intake Valve Diameter 2.020” Exhaust Valve Diameter 1.60” Valve Stem Diameter 11/32” Valve Spring Pocket ID 1.49” Valve Guide OD 0.530” (0.570” at base) Maximum Valve Lift 0.530” Rocker Stud Thread Size 7/16”-24 Valve Angle 23° Deck Thickness 0.750” Installed Spring Height 1.790” @ 130lbs