For 35 years, Air Flow Research (Valencia, CA) has been defining technology leadership in cylinder head manufacturing and flow dynamics. From their early days pioneering the porting of racing cylinder heads, AFR has been one of the industry's leaders in high performance heads for small and big block Chevys and Fords. The tradition of leadership continues today with their focus on computerized engineering, on-site foundry, and sophisticated 5-Axis CNC machining.