Proflow | SKU: PFEAHBB315121-CNC

Proflow Cylinder Heads, AirMax 320 CNC, Aluminium, BB Chevrolet, Assembled, 120cc Chamber, 315cc Intake Runner, Pair - PFEAHBB315121-CNC

Name: Proflow Cylinder Heads, AirMax 320 CNC, Aluminium, BB Chevrolet, Assembled, 120cc Chamber, 315cc Intake Runner, Pair - PFEAHBB315121-CNC
Brand: Proflow
SKU: PFEAHBB315121-CNC
Price: 5865.3 NZD
Availability: InStock

$5,865.30 NZD + GST

Shipping calculated at checkout.

Description

Part Number: PFEAHBB315121-CNC

Proflow Cylinder Heads, AirMax 320 CNC, Aluminium, BB Chevrolet, Assembled

Proflow does not sacrifice quality for a low priceyou get both with our aluminium cylinder heads. The lightweight heads are cast from A-356 aluminium alloy with a large choice of engine, for SB & BB Chevrolet, LS Chev Holden Ford SB 289-351W, 302, 351 Cleveland 2V & 3V & BB FE, and Chrysler SB & BB. They have phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They're also end-milled and drilled for accessories. The fully assembled heads have stainless steel valves, high performance valve springs, 7 degree valve locks, rocker arm studs, and guideplates.

This BBC cylinder head is recommended for agressive street or street/strip applications with displacements up to 540 cubic inches, operating at or below 6800 RPM. 1.625 O.D. Solid Roller, 275lbs on seat,.850 Maximum Lift.

SPECIFICATIONS
Material	A356 Aluminum
Intake Port Volume	317cc
Intake Port Dimension	2.450"H x 1.755"W x 13/32 Radius
Intake Port Location	Stock
Exhaust Port Volume	135cc
Exhaust Port Dimension	1.780"H x 2.025" W
Intake Valve Diameter (in):	2.25 in.
Exhaust Valve Diameter (in):	1.880 in.
Combustion Chamber Size	121cc
Valve Springs Pocket I.D.	1.735"
Maximum Valve Lift (in):	0.750 in.
Outside Diameter of Outer Spring (in):	1.625 in.
Lock Style:	10 degree
Rocker Arm Nut Thread Size:	7/16-20 in.
Valve Cover Mounting Style:	Perimeter bolt
Intake Valve Angle:	24/4
Exhaust Valve Angle:	15/4
Valve Guide Material:	Manganese Bronze
Intake Valve Seat Machine Style:	5-angle
Valve Seat Material:	Mental powder
Oiling Style:	Through pushrod

FEATURES

11/32" Intake Valve, 2.250" x5.500" O.A.L

11/32" Tulip Exhaust Valve, 1.880" x 5.450" O.A.L

Racing Spring #1224 1.625 O.D. Solid Roller, 275lbs on seat,.850 Maximum Lift, Max RPM 7400-7600

10° Retainers 1.490" O.D x 1.180" I.D x.765" I.D

10° 11/32" Valve Locks with lashcap recess

ARP 7/16" Rocker Exhaust Studs

ARP 7/16" Rocker Intake Studs

3/8" Guide Plates

11/32" Viton Valve Seals

Hardened Spring Cup 1.740" O.D / 1.650" I.D

11/32" Intake Manganese Bronze Valve Guides.502" O.D x 2.10" O.A.L

11/32" Exhaust Maganese Bronze Valve Guides.502" O.D x 2.25" O.A.L

RECOMMENDED COMPONENTS
Intake Port Gasket	(.120" Thick)
Intake Port Gasket	(.060" Thick)
Important	Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit the heads.
Exhaust Port Gasket	Head Gasket, Fel-Pro #1047 (Mark V and VI),Head Gasket,, Fel-Pro #1017-1 (Mark IV)
Head Bolts, 7/16"-14 x 7/16"-14 ARP 235-7202	ARP 135-3703 (Mark IV), ARP 135-3707 (Mark V),ARP 235-4713
Head Bolt Washers,	Manley
Stud Girdle	7/16 Stud Mount Rocker Arms - 1.7 Ratio (For Optimized Geometry)
1.7 Shaft Mount Rocker Arms T&D
Suggested Manifold	Victor Jr,Super Victor
Spark Plug Starting Range	Pump Gas 3924 / Race Gas 3922