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You are here: Home > Cylinder Heads > Air Flow Research Cylinder Heads > Chevrolet - Big Block > Chevrolet - Big Block 18° - Rectangular Port

AFR Magnum cylinder heads just grew by 1 with the new AFR 18° cylinder head. Built specifically for high horsepower race applications the AFR Magnum 18 flows and impressive 498cfm @ 1.000" lift with a 457cc runner, 90cc combustion chamber and 143cc exhaust. Available with Copper Seats and Ti/Inconel Valve as options. Get A Pair™ and dominate the track!




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AFR Cylinder Heads
AFR Cylinder Heads_Chevrolet_Big Block_18°_457cc_Rectangular Port_90cc_Assembled_Solid Roller
Price $2,327.00

P/N: AFR-3708
  • A356 Cast Aluminum
  • 457cc Intake Runner
  • Perimeter Valve Cover Bolt Pattern
  • 90cc Combustion Chamber
  • 7/16 ARP Rocker Studs
  • 3/8 Adjustable Guide Plates
more info
AFR Cylinder Heads
AFR Cylinder Heads_Chevrolet_Big Block_18°_457cc_Rectangular Port_90cc_Bare_Solid Roller
Price $1,895.00

P/N: AFR-3707
  • A356 Cast Aluminum
  • 457cc Intake Runner
  • Perimeter Valve Cover Bolt Pattern
  • 90cc Combustion Chamber
  • Unassembled - with no parts
more info