Aeroflow Performance | Huge range of performance car parts
In stock
Part Number
AF95-2427
AUD$2,804.14
In stock

Complete 320cc Aluminium Cylinder Heads with 120cc Chamber (Pair)
Suit Big Block Chev 396-454

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 big block Chevy cylinder heads are designed for street / race performance engines to give the ultimate in flow at a competitive price. These heads flow 364cfm! Best suited for high revving 454, or 502ci up Big Blocks. Made from A356 aluminium castings, these rectangle port 320cc cylinder heads are ideal for operating in the idle to 6750 rpm range. The complete heads include larger then stock 1.625" diameter dual valve spring to handle up to .850". Suits solid roller camshafts.

Head Specifications

Material:  A356 Aluminium
Chamber Chamber:  120cc
Intake Port Volume:  320cc
Intake Port Dimension:  2.45" x 1.75"
Exhaust Port Volume:  125cc
Exhaust Port Dimension:  1.75" H x 2.00" W
Exhaust Port Location:  Raised .375"
Spark Plug Location:  Angled
Intake Valve Diameter:  2.25"
Exhaust Valve Diameter:  1.88"
Valve Stem Diameter:  11/32"
Valve Spring Pocket I.D.:  1.735"
Valve Guide Material:  Manganese Bronze
Valve Guide O.D.:  .530" (.570" at base)
Rocker Stud Thread Size:  7/16" x 14
Valve Angle:  24° Intake / 15° Exhaust
Deck Thickness:  .750"
Suggested Components

Head Gasket (Mark IV):  Fel-Pro 1017-1
Intake Gasket (2.45 x 1.75 Port Size):  Fel-Pro 1275
Exhaust Gasket (1.75 x 2.00 Port Size):  Fel-Pro 1411
Head Bolts (Mark IV):  ARP 135-3610
Head Studs:  ARP 235-4018
Spark Plugs (14mm x 3/4" reach with flat gasket seat):  Champion RC9YC
Installed Components

Intake Valves:  2.25" x 5.49" x 11/32", part no. AF59-4271
Exhaust Valves:  1.88" x 5.42" x 11/32", AF59-4272
Valve Springs:  1.65" Dual spring, part no. AF59-4273
Valve Retainers:  10° 11/32", part no. AF59-4274
Valve Locks:  10° 11/32" part no. AF59-4275
Valve Seals:  11/32" x .530"
Rocker Arm Studs:  7/16"-14 x 7/16"-20, AF59-4276
Push Rod Guide Plates:  3/8" Raised (OE Style), part no. AF59-4277
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