Complete Small Block Ford Windsor 289-351 203cc Aluminium Cylinder Heads with 58cc Chamber (Pair)2.13" x 1.28" Intake Port, 1.40" x 1.40" Exhaust PortBrand: AEROFLOWPart Number: AF95-2360Description: Head Specifications
Material: A356 Aluminium
Chamber Chamber: 58cc
Intake Port Volume: 205cc
Intake Port Dimension: 2.13" x 1.28"
Exhaust Port Volume: 71cc
Exhaust Port Dimension: 1.40" H x 1.40" W
Exhaust PortLocation: Raised .250"
Spark Plug Location: OEM
Intake Valve Diameter: 2.08"
Exhaust Valve Diameter: 1.60"
Valve Stem Diameter: 8mm
Valve Spring Pocket I.D.: 1.64"
Valve Guide Material: Manganese Bronze
Valve Guide O.D.: .490" (.560"atbase)
Rocker Stud Thread Size: 7/16" x 14
Valve Angle: 20°
Deck Thickness: .750"
Additional Specifications: Head Specifications
Material: A356 Aluminium
Chamber Chamber: 58cc
Intake Port Volume: 203cc
Intake Port Dimension: 2.13" x 1.28"
Exhaust Port Volume: 71cc
Exhaust Port Dimension: 1.40" H x 1.40" W
Spark Plug Location: OEM
Intake Valve Diameter: 2.08"
Exhaust Valve Diameter: 1.60"
Valve Stem Diameter: 8mm;
Valve Spring Pocket I.D.: 1.64"
Valve Guide Material: Manganese Bronze
Valve Guide O.D.: .490" (.560" at base)
Rocker Stud Thread Size: 7/16" x 14
Valve Angle: 20°
Deck Thickness: .750"
Valve Spring Specifications
Installed Height: 2.040"
Installed Pressure: 175lbs
Open Pressure: 425lbs @ 500"
Maximum Lift: .790" @ 1.250"
Coil Bind: 1.190"
Spring Outside Diameter: 1.565"
Spring Inside Diameter: 0.790"
Spring Free Length: 2.480"
Valve Spring Retainer Outside Diameter: 1.500"
Valve Spring Inside Diameter: 0.465"
Valve Spring Retainer Step 1: 1.120"
Valve Spring Retainer Step 2: 0.705"
Valve Spring Locator Outside Diameter: 1.615"
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.