Proflow Cylinder Heads, AirMax 290 CNC, Aluminium, BB Chevrolet, Assembled, 112cc Chamber, 290cc Intake Runner, Pair - PFEAHBB290112-CNC
Proflow Cylinder Heads, AirMax 290 CNC, Aluminium, BB Chevrolet, Assembled, 112cc Chamber, 290cc Intake Runner, Pair - PFEAHBB290112-CNC is not in stock at Fast Lane Spares and will ship direct from supplier
Proflow Cylinder Heads, AirMax 290 CNC, Aluminium, BB Chevrolet, As...
Description
Description
Part Number: PFEAHBB290112-CNC
Proflow Cylinder Heads, AirMax 290 CNC Ported, 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. Perfect for your Mild or High performance Hot Rod.
SPECIFICATIONS
Material
A356.2 Aluminum
Intake Port Volume
290cc
Intake seat size
2.25 OR 2.30
Exhaust seat size
1.88
Intake Port Dimension
2.030"H x 1.830"W x1/2 Radius
Intake Port Location
Stock
Exhaust Port Volume
135cc
Exhaust Port Dimension
1.770"H x 2.010" W
Exhaust Port Location
.375" Raised
Combustion Chamber Size
112cc
Valve Cover Bolt Pattern
Perimeter Bolt
Valve Angle
24°/4° Int, 15°/4° Exh
Valve Spring Pocket Diameter
1.725" O.D
Max Valve Spring Pocket Machining
1.750" O.D
Deck Thickness
.750"
Minimum Bore Diameter
4.250"
Flat Mill
.006" per cc/ Maximum 102cc
Angle Mill (Angle mills might require a.120" Thick intake gasket.)
.009" per cc/ Maximum 97cc
Minimum Cross Sectional Area
2.895 sq. in.
Spark Plug Dimensions
14mm x.750" w/Gasket Seat
Intake Valve Seat Machine Style:
5-angle
FEATURES
11/32" Intake Valve, 2.250" x 5.500" O.A.L
11/32" Nail Head Exhaust Valve, 1.880" x 5.450" Overall Valve Length
Racing Springs#1940 1.550" O.D. Hydraulic Roller Dual Valve Spring, 175 lbs. on seat,.725" maximum lift, 473lbs @.600 lift, Max RPM 6500-6700
Racing Spring 1.550 O.D. Solid Roller Valve Spring, 220lbs on seat,.710" Maximum Lift, Max RPM 7200-7400 (upgrades available)
Manley 10° Steel Retainers 1.500" O.D x 1.120"I.D x.705" 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 Valve Spring I.D Locator 1.550" O.D x.780" I.D
Intake Valve Seats 2.450" O.D x 1.950" I.D x.375" Deep
Exhaust Valve Seats 2.000" O.D x 1.580" I.D x.375" Deep
11/32" Intake Bronze Valve Guides.502" O.D x 2.10" O.A.L
11/32" Exhaust Bronze Valve Guides.502" O.D x 2.25" O.A.L
RECOMMENDED COMPONENTS
Intake Port Gasket
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
ARP 135-3703 (Mark IV)
Head Bolts
ARP 135-3707 (Mark V)
Head Studs
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
Aftermarket
Suggested Manifold
Victor Jr
Suggested Manifold
RPM Performer
Spark Plug Starting Range
Autolite 3924
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