Complete Small Block Chev 327-350-400 213cc CNC Ported Aluminium Cylinder Heads with 68cc Chamber (Pair)2.15" x 1.30" Intake Port, 1.45" x 1.50" Exhaust PortBrand: AEROFLOWPart Number: AF95-2401Description: The Aeroflow Series of Aluminium Cylinder Heads are taking affordable performance street and strip cylinder heads to the next level. Theseheads utilise ultra-smooth A356-T6 aluminium castings, new as-cast runner and chamberdesigns produce excellent flownumbers. This combined with a 5-angle competition valve job,diamond-honed bronze guides, hand bowl blending and professional assembly help to outperform some of the best brands in the business.
The Aeroflow Performance small block Chevy cylinder heads are designed for street / race performance engines to give the ultimate in flow at a competitive price. Made from A356-T6 aluminium castings, these 213cc cylinder heads feature full CNC ports and are ideal for operating in the idle to 7500 rpm range. These completecylinder heads will fit a 4.00" bore and larger. They include larger then stock1.57" diameter dual valvespring to handle up to .625" maximum lift. Suitsmechanical and hydraulic roller camshafts.
Additional Specifications: Head Specifications
Material: A356 Aluminium
Chamber Chamber: 68cc
Intake Port Volume: 213cc
Intake Port Dimension: 2.15" x 1.30"
Exhaust Port Volume: 82cc
Exhaust Port Dimension: 1.45" H x 1.50" W
Spark Plug Location: Angled
Intake Valve Diameter: 2.08"
Exhaust Valve Diameter: 1.60"
Valve Stem Diameter: 8mm
Valve Spring Pocket I.D.: 1.57"
Valve Guide Material: Manganese Bronze
Valve Guide O.D.: .502" (.560" at base)
Rocker Stud Thread Size: 7/16" x 14
Valve Angle: 23°
Deck Thickness: .625"
Valve Spring Specifications
Installed Height: 1.990"
Installed Pressure: 195lbs
Open Pressure: 450lbs @ 500"
Maximum Lift: .750" @ 1.240"
Coil Bind: 1.180"
Spring Outside Diameter: 1.565"
Spring Inside Diameter: 0.795"
Spring Free Length: 1.470"
Valve Spring Retainer Outside Diameter: 1.500"
Valve Spring Inside Diameter: 0.475"
Valve Spring Retainer Step 1: 1.120"
Valve Spring Retainer Step 2: 0.705"
Valve Spring Locator Outside Diameter: 1.620"
Valve Spring Locator Inside Diameter: 0.565"
Important Information: IMPORTANT NOTICE:
We recommend to check installed spring seat pressure & open pressure before installing your cylinder headsto make sure the spring pressure is correct for your application.