Proflow Cylinder Heads & Rocker Kit, SuperMax EFI Aluminium, Complete, 590 HP , 63cc Chamber, 200cc Intake Runner, EFI Holden Commodore VN, Pair

Proflow Holden Commodore VN SuperMax Aluminium Heads & Rocker Kit Complete 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” Proflow SuperMax Pro Roller Rockers Kit - Holden V8 VN 5.0L Carby or EFI , Proflow or Edelbrock Cylinder Heads Proflow offers SuperMax Series shaft-mount rocker arm systems fulfill the needs of successful racers and performance engine builders at every level. The SuperMax rocker arms are made from quality 2024 aluminium extrusions built to withstand over 850lbs of max open spring pressures! This kit includes CNC-machined billet steel pedestals, and ground steel alloy rocker shafts, which come complete with all the components and hardware required for a professional installation, including shims. These 2024 custom aluminum formulas are designed for the Serious racer and have had extensive RND and testing conducted before release, meeting all nessasary performance requirements. SuperMax Series aluminum shaft rocker arms are available for a variety of engine applications. Specifications: Suits 5.0L VN style heads Shaft mount full roller style 1.65 Ratio 7/16" Stud Size 850 lbs max open pressure FEA designed and tested Mirror polished roller tips for smooth operation Socket head cap screw mounting studs Extruded from aircraft grade 2024-T6 aluminium Application: Edelbrock Performer VN 5.0L Heads Proflow SuperMax VN 5.0L Heads