In 1988, Exin marketed a new Porsche 959 model with lights and reference number 4083. The model came in three colors: white and red with "Porsche" decoration, and black with "Hertz" decoration. The same models without lights were marketed with reference number 4084. It was the first model to incorporate the RX-5 engine with four-wheel drive. This black model displays the name "Mass", but it is fictional and has no correspondence with any real competition, beyond incorporating Jochen Mass's name as a nod to a Porsche driver of that era.