Big Block Chev 396-454 - 320cc Aluminium Cylinder Heads

$2,791.68

The Aeroflow Series of Aluminium Cylinder Heads are taking 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.

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

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"

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The Aeroflow Series of Aluminium Cylinder Heads are taking 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.

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

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"

The Aeroflow Series of Aluminium Cylinder Heads are taking 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.

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

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"