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Proflow Cylinder Heads AirMax-B 185 SB Ford 289 302 351W Aluminium Bare Cylinder Heads 61cc Chamber 185cc Intake Runner Pair Must Have
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Proflow Cylinder Heads AirMax-B 185 SB Ford 289 302 351W Aluminium Bare Cylinder Heads 61cc Chamber 185cc Intake Runner Pair Must Have

Original price was: $1,155.00.Current price is: $462.00.

SKU: SK1035105-US20260126-092757 Category: Tag:

Description

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Proflow Cylinder Heads, AirMax 185, SB Ford 289,3 02, 351W Bare

Proflow does not sacrifice quality for a low price–you 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, 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. Perfect for your Mild or High performance Hot Rod.

Note: We suggest using Proflow Head Bolt Stepped washers part number PFEAHF-HBW. Proflow head bolt insert washers are designed to be used on Ford Windsor cylinder heads in applications where you have 7/16″ head bolts being used in 1/2″ bolt holes. This stops the head bolt hole distorting on aluminium heads when using 7/16” bolts on 289 / 302 standard Windsor blocks.

Specifications & Features:
Material A356Aluminum
Intake Port Volume 190cc
Intake seat size 2.02
Exhaust seat size 1.60
Intake Port Dimension 2.045″ H x 1.205″ W x 3/8 Radius
Intake Port Location Stock
Exhaust Port Volume 70cc
Exhaust Port Dimension 1.355″ H x 1.360″ W
Exhaust Port Location Stock
Combustion Chamber Size 58cc
Valve Cover Bolt Pattern Perimeter Bolt
Valve Angle 20°
Valve Spring Pocket Diameter 1.460″ O.D
Max Valve Spring Pocket Machining 1.625″ O.D
Deck Thickness .750″
Minimum Bore Diameter 4.000″
Flat Mill .006″ per cc 54cc Max (from 58cc); 68cc Max (from 72cc);
Angle Mill .009″ per cc 48cc Max (from 58cc); 62cc Max (from 72cc)
Note:Angle mills might require a .120″ Thick intake gasket.
Minimum Cross Sectional Area 2.025 sq. in.
Spark Plug Dimensions 14mm x .750″ w/Gasket Seat
Head Bolt Diameter 1/2″
Stud Mount – Non-Emissions Legal
Combustion Chamber
8mm Bead Lock Intake Valve 2.020″ x 4.900″ O.A.L. 11/32 guide is an option
8mm Bead Lock Exhaust Valve 1.600″ x 4.950″ O.A.L.
Pedastal 8mm Bead Lock Intake Valve 2.020″ x 5.080″ O.A.L
Pedastal 8mm Bead Lock Exhaust Valve 1.600″ x 5.100″ O.A.L
Racing Spring 1.290″ OD Hydraulic Roller Dual Valve Spring, 140 lbs on seat, .600″ maximum lift, Max RPM 6300-6500 (upgrades available)
7° Manley Steel Retainers 1.245″ O.D x .885″ I.D x .655″ I.D
7° Bead Lock Valve Keepers
3/8″ Rocker Studs
5/16″ Guide Plates
Viton Valve Seals .600″ O.D x .495″ I.D
Hardened Valve Spring O.D Locator 1.380″ O.D x .570″ I.D
Powder Metallurgy Intake Valve Seats 2.131″ O.D x 1.680″ I.D x .375″ Deep
Powder Metallurgy Exhaust Valve Seats 1.650″ O.D x 1.350″ I.D x .375″ Deep
8 mm Bronze Valve Guides .502″ O.D x 2.100″ O.A.L
Thermactor Air Injector Reducer Bushing (5/8″-11 x 7/16″-14)
Recommended Components:
Intake Port Gasket, Fel-Pro #1262
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit the heads.
Exhaust Port Gasket, Fel-Pro #1415
Head Gasket, 302/351W, Fel-Pro #1011-1
SB Ford 1/2″ Bolt Head Bolts, ARP #154-3603
SB Ford 1/2″ Bolt Head Studs, ARP #254-4503
1/2″ Bolt – 7/16″ Thread Head Bolts, 289/302W: ARP 254-3708
Head Bolt Washers, Manley

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