One of only two Porsche-Kremer CK5 prototypes, raced at Le Mans, heads to Broad Arrow’s 2025 Monterey Jet Center Auction.
A piece of endurance racing history is set to cross the block at the Broad Arrow Monterey Jet Center Auction on August 14, 2025. The 1983 Porsche-Kremer CK5 Group C Endurance Racing Prototype, chassis CK5-02, is expected to bring between $800,000 and $950,000, offering collectors a rare chance to own one of just two CK5s ever built.
Originally constructed by Kremer Racing, the Cologne-based team famous for its Porsche 935 K3 that won Le Mans in 1979, the CK5 was created as an independent response to Porsche’s factory-only 956 program in 1982. Drawing heavily from Porsche’s most successful prototypes, the CK5 combined a lightweight aluminum spaceframe, 917-sourced suspension and brakes, and a twin-turbo flat-six engine derived from the 935 K3. The result was a privateer-built prototype capable of matching factory teams on sheer speed.
CK5-02 debuted at the 1983 24 Hours of Le Mans under the Grand Prix International banner, piloted by Derek Warwick, Frank Jelinski, and Patrick Gaillard. It qualified as the fastest non-factory Porsche 956 or Lancia LC2, running as high as third overall before retiring with a head gasket failure. Following Le Mans, the car competed in additional Group C and DRM events, later entering Interserie competition through 1985.
The car has remained remarkably original, retaining its matching-numbers engine, transmission, and period Reutter bodywork. After spending decades in private collections, including time in Walter Wolf Racing livery, CK5-02 was restored to its 1983 Le Mans appearance in 2022. It appeared at Porsche Rennsport Reunion 7 in 2023, marking a rare public showing of this Group C legend.
Broad Arrow describes the car as a prime candidate for either continued preservation or vintage endurance racing. For Porsche enthusiasts, CK5-02 represents a pivotal moment when privateers challenged factory dominance at the dawn of the Group C era. See it here.
