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AFR's Magnum line of 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 Options. Get A Pair™ and dominate the tracks!