The Cortina Crossflow block was also the basis for the FVA (four valve Type A), an F2 engine introduced in 1966, and developed under the same contract as the DFV, for the new 1.6-litre engine rules. This engine featured 16 valves operated by twin overhead camshafts driven by a train of 9 gears. The metering unit for the Lucas mechanical fuel injection was rotated by a toothed belt from the gear-driven inlet cam, while the exhaust cam directly drove an alternator on the rear of the head. It produced at 9000 rpm. This engine dominated the category until 1971, and was also used in sports car racing in 1.8 Litre form as the "FVC".