Proflow Cylinder Heads, SuperMax EFI Aluminium, Complete, 590 HP Out of Box, 63cc Chamber, 200cc Intake Runner, EFI Holden Commodore VN, Pair

Proflow Holden Commodore VN SuperMax-EFI Aluminium Heads Bare 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. Perfect for your Mild or High performance Hot Rod. SPECIFICATIONS Combustion Chamber 63 cc Intake Port Volume 200 cc Intake Port Dimensions 2.170” (H) x 1.285” (W) Exhaust Port Volume 72 cc Exhaust Port Dimensions 1.450” (H) x 1.283” (W) Spark Plug Location OEM Intake Valve Diameter 2.020” Exhaust Valve Diameter 1.60” Valve Stem Diameter 8 mm Valve Spring Pocket ID 1.650” Valve Guide OD 0.530” Maximum Valve Lift 0.700” Rocker Stud Thread Size 7/16”-14 Valve Angle 5° Deck Thickness 0.6875”