Porsche scored a couple of unexpected Le Mans wins in 1996 and 1997. A return to prototype racing in the US was planned for 1995 with a Tom Walkinshaw Racing chassis formerly used as the Jaguar XJR-14 and the Mazda MXR-01 fitted with a Porsche engine. IMSA rule changes struck this car out of the running and the private Joest Racing team raced the cars in Europe for two years, winning back-to-back Le Mans with the same chassis, termed the Porsche WSC-95. This is a feat Porsche had also achieved in the 956 era, contrasting with the 1960s and 1970s where most cars ran only one or two races for the works before being sold on.