Towards the end of the 1996 season Porsche made revisions to the 911 GT1 in preparation for the 1997 season. The revised car was known as the 911 GT1 Evo (or Evolution). The car had the same 592 hp turbo-charged engine, but new aerodynamics made the '97 car considerably faster. Top speed was still around 330 km/h (205 mph)
The only Porsche 911 GT1 Evo race car ever to be converted for street use was sold at an RM Sotheby's auction in 2016 for €2.77 million (approximately $3.14 million).