In 1967 Porsche prepared a small number of 934 Porsches with 935 Group 5 parts for the Trans-Am and IMSA GTO series. In the end, the 934/5 dominated the Trans-Am series by taking to top five positions in the championship.
Ludwig Heimrath became the 1977 Trans-Am champion in his 934/5 by protesting Peter Gregg’s highly modified car. Together they humbled the Corvette C3s and the Group 44 Jaguar XJS. Later
Meanwhile in the IMSA-sanctioned 1977 Camel GT Challenge, Hurley Haywood placed second at the end of the season in the Bob Hagestad 934/5 as prepared by Franz Blam Racing. They were beaten by the DeKon Monza of Al Holbert.
Customers of the factory 934/5s included Jim Busby, Peter Gregg, The Interscope Team, George Dyer, Vasak Polak, Ciro Nappi, Bob Hagestad, Ludwig Heimrath, Dick Barbour and Clifford Kearns.
All the 934s were delivered, body-in-white, to several teams with the 935 wheel flares and rear wing. Only ten 934/5s were officially made by Porsche with the chassis numbers 9307700951, 9307700952, 9307700953, 9307700954, 9307700955, 9307700956, 9307700957, 9307700958, 9307700959, 9307700960.
1976 Porsche 934/5 – did not sell for $550,000 From the Steve Goldin Collection. 1 of 10 factory built 934 1/2s built. Designed specifically for IMSA competition. Original owner was Bob Hagestad Racing. Driven by Hurley Haywood. Finished 2nd overall in 1977 IMSA Championship with several wins. Correct Porsche single turbo motor. – Sold on bill of sale Auction Source: 2012 Daytime Auction by Mecum