In the United States, Cosworth has also appeared in the name of a road car, the Chevrolet Vega. Only 3,508 1975 and 1976 Cosworth Vegas were built. The engine featured the Vega sleeveless, aluminum-alloy block fitted with forged components. The twin-cam, 16 valve, aluminum cylinder head design was assisted by Cosworth. The engine featured electronic ignition, electronic fuel injection, and stainless steel headers. The final US version produced 110 bhp. Cosworth's EA racing version was not successful due to engine block structural failures. Projected sales of the Cosworth Vega had been 5,000. The 1500 unused hand-built Cosworth Vega engines were simply scrapped for lack of demand.