In 1983 Fabi would drive the #4 Martini Porsche 956 in the #4 Lancia LC2-Ferrari 268C 2.6L Turbo V8.
After the 1990 IndyCar season proved to be a backwards step he returned to the series in 1991 with Tom Walkinshaw Racing/Silk Cut Jaguar in the #34 Jaguar XJR-12 and Jaguar XJR-14.