In the golden age of 1980s prototype racing, the IMSA GTP Lights category was a battlefield for lightweight, high-strung machines. And in this fight, the 1985 Argo JM19, specifically when paired with Mazda’s rotary magic, was the undisputed king. This car is a pure, distilled shot of 80s endurance racing brilliance.

Built by the British firm Argo Racing Cars, the JM19 was a featherweight killer. Its foundation was a stiff aluminum honeycomb monocoque, draped in sleek, ground-effect bodywork. But its soul? That came from Japan. Nestled behind the driver was the screaming heart of a Mazda 13B rotary engine. This wasn’t just any Wankel; it was a high-revving, peripheral-ported monster that shrieked an unmistakable battle cry all the way to redline.

This combination, particularly in the hands of legends like Jim Downing, was utterly dominant. The Argo-Mazda was a dynasty machine, clinching the IMSA Camel Lights championship three years in a row—1985, 1986, and 1987. It was a giant-slayer that proved clever engineering, minimal weight, and the unique, high-RPM fury of a rotary engine was the perfect recipe for victory. This car didn’t just compete; it conquered.