Aeroflow Complete Small Block Ford Windsor 289-351 200cc CNC Ported Aluminium Cylinder Heads with 60cc Chamber (Pair) (AF95-2361)

AF95-2361 - SBF 200cc CNC ALLOY HEADS ASSE

2.13" x 1.28" Intake Port, 1.40" x 1.40" Exhaust Port

Part Number: AF95-2361

The Aeroflow Series of Aluminium Cylinder Heads are taking affordable performance street and strip cylinder heads to the next level. These heads utilise ultra-smooth A356-T6 aluminium castings, new as-cast runner and chamber designs produce excellent flow numbers. 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 Ford Windsor 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, they feature full CNC intake ports and chambered square exhaust ports. These 200cc heads accept larger then stock 1.575" diameter dual valve spring to handle up to .710" maximum lift. Suits hydrauic roller camshafts.
Note:
These heads are drilled for 1/2" head bolts. If using a 7/16" bolt, you must use a head bolt bushing kit or step down head bolts.

Specifications: Head Specifications

Material:  A356 Aluminium
Chamber Chamber:  60cc
Intake Port Volume:  200cc
Intake Port Dimension:  2.13" x 1.28"
Exhaust Port Volume:  68cc
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: 2.050"
Installed Pressure: 175lbs
Open Pressure: 415lbs @ 500"
Maximum Lift: .800" @ 1.250"
Coil Bind: 1.200"
Spring Outside Diameter: 1.570"
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: 0.560"

Important Information: 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.