Take an S63 AMG Sedan:
Remove: AWD, sunroof, seats, driver assists (accept for stability control and traction control, but make them fully defeatable), leather everything, air suspension, most of the sound deadening, mufflers, wheels, infotainment and anything else that you don’t need.
Install: Fender flares, 4 sport bucket seats, manually adjustable Bilstein’s, torsen limited slip diff, high flow mufflers, ecu tune for more power, wider forged racing wheels, ultra grippy tires, large paddle shifters, mounts for harnesses, and helmet storage bins in the trunk.
Paint it red and call it the Red Pig edition. Make only a few and sell them for a high price