Air Flow Research AFR1110 Chev SB 302-400 Eliminator Alloy Cylinder Heads 220cc Complete (pair)

AFR is reviving its popular 220cc moniker due to overwhelming request from customers for a larger bolt on standard valve location head.

Unlike the previous 220, the new Eliminator version requires no special parts. Valves and studs are in stock GM L98 locations just like the popular, 180, 195, and 210 series heads. They do not require offset rockers of any kind yet are still able to muster flow numbers that are in raised runner head territory. A 325 CFM head that is perfect for someone wanting to retain all their standard components while still having the airflow to reach that elusive 700 HP mark in aggressive drag race trim. Displacement ranging from a high RPM 350 to a 427 CID with natural applications in the various sportsman classes, bracket/drag cars, oval track, and larger displacement street machines with typical operating ranges between 4000 to 8000 RPM nding on application.

Getting this much flow from a stock geometry 23° head means they will only be available in fully optimized "competition" CNC porting. As always, they come with AFR's trademark 3/4" thick head deck (ideal for nitrous or blower applications). Standard valves are lightweight 8mm 2.100 intake and 1.600 exhaust with AFR's hardened ductile iron interlocking seats. Dual valve cover bolt pattern is standard. Exhaust port is raised .250 over GM L98.Basic Package Components:

• 100% CNC Ported Combustion Chambers
• 100% CNC Ported Exhaust Ports
• 100% CNC Ported Intake Ports
• 3-angle Radiused Valve Job
• Bead Lock Intake Valve, 2.080" x .100" long
• Bead Lock Exhaust Valve, 1.600" x .100" long
• 1.550" OD Roller Dual Valve Spring w/ dampener, 225 lbs on seat, .710" maximum lift
• 10° 4140 Chrome Moly Retainers
• 10° Bead Lock Valve Keepers
• 7/16" Rocker Studs
• Guide Plates
• Viton Valve Seals
• Hardened Spring Seat
• Intake Valve Seats
• Exhaust Valve Seats
• Bronze Valve Guides

Application: ChevSmall Block Gen 1 302-400 C.I.D.(Angled plug)

• Cylinder Head Style: Assembled
• Cylinder Head Material:Aluminum
• Cylinder Head Finish:Natural
• Combustion Chamber Volume (cc):65
• CNC-Machined Combustion Chamber:Yes
• Intake Runner Volume (cc):220cc
• Exhaust Runner Volume (cc):80cc
• CNC-Machined Intake Runner:Yes
• CNC-Machined Exhaust Runner:Yes
• Combustion Chamber Style:Heart
• Intake Port Shape:Rectangular
• Intake Port Location:Standard
• Exhaust Port Shape:Square
• Exhaust Port Location:Standard
• Spark Plug Style:Angle
• Intake Valves Included:Yes
• Intake Valve Diameter (in):2.100 in.
• Exhaust Valves Included:Yes
• Exhaust Valve Diameter (in):1.600 in.
• Valve Springs Included:Yes
• Maximum Valve Lift (in):0.710 in.
• Outside Diameter of Outer Spring (in):1.550 in.
• Damper Spring Included:Yes
• Number of Springs Per Valve:Dual
• Retainers Included:Yes
• Retainer Material:Chromoly steel
• Locks Included:Yes
• Lock Style:10 degree
• Valve Stem Seals Included:Yes
• Rocker Arm Studs Included:Yes
• Rocker Arm Nut Thread Size:7/16-20 in.
• Rocker Arms Included:No
• Rocker Arm Nuts Included:No
• Guideplates Included:Yes
• Guideplate Pushrod Size:5/16 in.
• Valve Cover Mounting Style:Perimeter bolt
• Accessory Bolt Holes Drilled:Yes
• Intake Valve Angle:23
• Exhaust Valve Angle:23
• Valve Guides Included:Yes
• Valve Guide Material:Bronze
• Valve Seats Machined:Yes
• Valve Seat Machine Style:3-angle
• Valve Seat Material:Ductile iron
• Steam Holes Drilled:No
• Oiling Style:Through pushrod
• Machined for O-Ring:No
• Heat Crossover:No
• Quantity:Sold as a pair.
• Notes:Cylinder heads are based on L98 geometry, not compatible with self-aligning rocker arms. Exhaust port is raised 0.250 in. over stock. These cylinder heads are competition-ported.