Proflow Cylinder Heads, AirMax 205, SB Ford 302, 351C, Assembled

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. Perfect for your Mild or High performance Hot Rod.

SPECIFICATIONS

Material: 356 Alloy, T6
Chamber Volume: 69cc
Intake Runner Volume: 207cc
Intake Port location: OEM
Minimum Cross Section: 2.368 square inches (min)
Exhaust Runner Volume: 120cc - high velocity
Exhaust Port Location: Raised .080'' (near stock location)
Valve sizes: Intake 2.10" x 5.250" (45 degree seat, custom 5 angles blended)

Exhaust 1.650'' x 5.050" (45 degree seat custom high velocity radius/blended)
Valve Guide Angles: Canted Valve angles Intake 10.0 x 4.0 degrees Exhaust: 9.5 x 3.0 degrees
Valve Guides: Bronze.502'' od x 11/32'' stems.570" shoulder
Valve Seat Inserts: Intake: 2.250'' x 1.880 x 3/8 (Durabond 7000 series) Exhaust: 1.680'' x 1.430'' x 3/8
Spark Plugs: relocated for efficient fast burn, ¾ reach, 5/8 hex, washer seat (NGKBCP7ES)
Spring Pads: 1.560'' OD / .560'' ID (1.190" Coil Bind)
Valve Spring Height: 1.960'' (with stock length valve)
Installed Height: Int - 1.90" @ 125lbs 
Exh - 1.90" @ 128lbs
Spring Rate 229 lbs 
Guide seal to retainer base 0.917"
Rocker Arm Type: 7/16'' stud mounted roller rockers (1.73 ratio)
Ext Water Port: Heads have 3/4 npt tapped hole on each end which need to be plugged if not used
Head Bolts: Accept oem length bolts or studs
Pushrods: 5/16'' or 3/8'' (check required length)
Rocker Arm Studs: 7/16'' unc
Spring Rate: 229 lbs / inch
Installed Height: 125lbs @ 1.90"
   
Proflow Cylinder Heads, AirMax 200, Assembled Aluminium, Ford Cleveland , 2V 68cc Chamber, 205cc Intake Runner, Pair Diagram Image

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