Complex sentence: Although he did not finish either event, his driving attracted attention; a private Porsche team offered Toivonen a car for the 1000 Lakes Rally, as did Chrysler for the Lombard RAC Rally.
Split into simpler sentences: Although he did not finish either event, his driving was noticed. A private Porsche team offered Toivonen a car for the 1000 Lakes Rally, and Chrysler did the same for the Lombard RAC Rally.