intake manifolds technical engine cars close prototype sports up airbox am can chimneys cooler sportscars usa 1 formula hi res 1972 1973 glen other races riverside watkins a3 1494 180 1962 1969 804 9200 a4 automobile brm ford germany italy mechanics monza porsche typ v8 1965 1966 1970 1999 above belgium carlo de ferrari francorchamps hockenheim lotus monaco monte nuerburgring pits spa supertec tomaso turbine williams