4. 1997/8 Mercedes-Benz CLK GTR
6.9-liter V-12; 612 hp @ 6800 rpm, 568 lb-ft @ 5250
Manufacturers may not have enjoyed the FIA’s homologation requirement for all cars entered into the GT Championship, but car enthusiasts certainly did, as it meant companies had to build road-going versions of their insane, over-the-top race machines. Mercedes-Benz was no exception: the wild CLK GTR was built in both race and road car forms, though the latter differed from its race cousins mostly in interior trimmings. Road-going CLK GTRs used a 6.9-liter V-12, good for 612 hp, and paired it with a sequential manual transmission. For those who found that somehow unsatisfying, HWA – AMG’s partner devoted to motorsport pursuits – could convert the car into a “super sport,” replacing the 6.9-liter engine with a 7.3-liter V-12, good for more than 654 hp.