This rare 2.1-liter Ford Zakspeed DOHC inline-four, one of approximately 100 examples, was originally built for the experimental front-engine Ford Motorsport GTP Mustang to compete in the IMSA Camel GT series. Capable of producing around 600 horsepower, this engine retains its clutch, starter, alternator, distributor, ignition wires, dry-sump oiling system, fuel injectors, and Bosch Kugelfischer MFI pump assembly, and was rebuilt by Roush Performance. The turbocharger, intake, and exhaust manifolds are not included.