The Porsche Carrera RSR Turbo was the first Porsche race car to ever run a turbocharged engine. That engine, a 2.1-liter flat six produced a massive 500 hp with aid of forced induction. In 1974 in placed second overall at Le Mans and cemented the benefits of turbocharging in the minds of those at the helm at Porsche. Only one year later in 1975 the first turbocharged production Porsche, the 930, was released.
The shirts are soft, high-quality, pre-shrunk, 100% combed, ring-spun cotton. They're form-fitting and will maintain they're shape after washing.
Washing in cold. Dry low. Use non-chlorine bleach, only when necessary. No fabric softeners. Do not dry clean.