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

• Material: 356 Alloy, T6
• Chamber Volume: 68cc
• Intake Runner Volume: 207cc
• Intake Port location: raised .100" over stock
• Minimum Cross Section: 2.18 square inches MCSA
• Exhaust Runner Volume: 125cc - high velocity
• Exhaust Port Location: Raised .080" (near stock location)
• Valve sizes: Intake 2.10" (45 degree seat, custom 5 angles blended)
• Exhaust 1.650" (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: 1.570" od/.560" id
• Valve Spring Height: 1.960" (with stock length valve)
• Pushrods: 5/16" or 3/8" (check required length)
• Rocker Arm Studs: 7/16" unc
• 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