Description

Complete Small Block Chev 327-350-400 204cc Aluminium Cylinder Heads with 67cc Chamber (Pair)2.22″ x 1.31″ Intake Port, 1.34″ x 1.39″ Exhaust Port
Brand: AEROFLOW
Part Number: AF95-2350
Description:

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. Include valves, valve springs,retainers & locks, guide plates and 7/16″ rocker studs.

The Aeroflow Performance small block Chevy cylinder heads are designed for entry level street performance engines to give the ultimate in flow at a budget price. Made from A356 aluminium castings, the 204cc cylinder heads are ideal for operating in the idle to 6500 rpm range. These cylinder heads will fit a 4.00″ bore and larger. Theses complete heads include larger then stock 1.43″ diameterdual valve springs to handle up to .575″ maximum lift.Suits flat tappet and hydraulic camshafts.

Additional Specifications: Head Specifications

Material: A356 Aluminium
Chamber Chamber: 67cc
Intake Port Volume: 204cc
Intake Port Dimension: 2.22″ x 1.31″
Exhaust Port Volume: 70cc
Exhaust Port Dimension: 1.34″ H x 1.39″ W
Spark Plug Location: Straight
Intake Valve Diameter: 2.02″
Exhaust Valve Diameter: 1.60″
Valve Stem Diameter: 11/32″
Valve Spring Pocket I.D.: 1.49″
Valve Guide Material: Manganese Bronze
Valve Guide O.D.: .530″ (.570″ at base)
Rocker Stud Thread Size: 7/16″ x 14
Valve Angle: 23
Deck Thickness: .625″

Valve Spring Specifications

Installed Height:1.790″
Installed Pressure:135lbs
Open Pressure:290lbs @ 500″
Maximum Lift:.540″ @ 1.250″
Coil Bind:1.210″
Spring Outside Diameter:1.450″
Spring Inside Diameter:0.700″
Spring Free Length:2.350″
Valve Spring Retainer Outside Diameter:1.400″
Valve Spring Inside Diameter:0.395″
Valve Spring Retainer Step 1:1.060″
Valve Spring Retainer Step 2:0.680″
Valve Spring Locator Outside Diameter:1.560″
Valve Spring Locator Inside Diameter:0.560″
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.