GTP 101: The Acura ARX-06’s internal combustion engine
3D-printed exhaust outlets? An air-to-water intercooler placed inside the turbocharger plenum? Acura's IndyCar-bred ARX-06 engine is unlike anything found in IMSA's new WeatherTech SportsCar Championship hybrid GTP class, and thanks to Honda Performance Development, RACER was taken on a tour of the 670hp 2.4-liter twin-turbo V6 motor ahead of its competition debut at the Rolex 24 At Daytona.
Marshall Pruett
The 2026 season marks Marshall Pruett's 40th year working in the sport. In his role today for RACER, Pruett covers open-wheel and sports car racing as a writer, reporter, photographer, and filmmaker. In his previous career, he served as a mechanic, engineer, and team manager in a variety of series, including IndyCar, IMSA, and World Challenge.
Read Marshall Pruett's articles
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