Leader Cards Inc
| Based in: Glendale, California Founded: 1941 (active 1959) Principal: Frank Kurtis |  |
Californian, Frank Kurtis built front-engined roadsters for Indianapolis and midgets for US- style oval racing. One such design was entered for the first World Championship USA GP in an attempt at an early Grand Prix versus IndyCar showdown.
Cars
| Car designation | Race years |
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