Complete Small Block Ford Windsor 289-351 203cc Aluminium Cylinder Heads with 58cc Chamber (Pair)

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  • Regular price $2,300.00
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The Aeroflow small block Ford Windsor cylinder heads and designed for street / race performance engines to give the ultimate in flow at a competitive price. Made from A356 Aluminium castings the 205cc cylinder heads are ideal for operation between idle and 7500rpm. The complete heads include larger than stock 1.575" (40mm) diameter dual valve springs to handle up to 0.710" (18mm) maximum. Suits hydraulic roller camshafts.

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"

Installed Components

Intake Valves:  2.08" x 5.00" x 8mm, part no. AF59-3030
Exhaust Valves:  1.60" x 5.03" x 8mm, part no. AF59-3031
Valve Springs:  1.575" Dual spring
Valve Retainers:  10° 8mm
Valve Locks:  10° 8mm
Valve Seals:  8mm x .502" Viton
Rocker Arm Studs:  7/16"-14 x 7/16"-24, part no. AF59-3026
Push Rod Guide Plates:  5/16" Flat, part no. AF59-3027

Suggested Components

Head Gasket:  Fel-Pro 1011-1
Intake Gasket (1.28 x 2.13 Port Size):  Fel-Pro 1262
Exhaust Gasket (1.40 x 1.40 Port Size):  Fel-Pro 1487
Head Bolts:  ARP 154-3605 (7/16") or 154-3603 (1/2")
Head Studs:  ARP 154-4003
Spark Plugs (14mm x 3/4" reach with flat gasket seat):  Champion RC9YC


We recommend to check installed spring seat pressure & open pressure before installing your cylinder heads to make sure the spring pressure is correct for your application.