In the pantheon of '80s supercars, absolute top speed was the number against which they were compared. The RUF CTR, Porsche 959, and Ferrari F40 were 200 MPH+ contenders, but they all paled in comparison to the Callaway SledgeHammer. With the blessing of GM, Callaway built a bespoke twin-turbocharged V8 with numbers that make even today's wildest creations blush — 898 horsepower and 772 lb-ft of torque. That was enough to push the SledgHammer to a terminal velocity of 255 MPH, a figure that modern hypercars would be proud of. And the car here is the very one that set the record. It's spent most of the last three decades on display and is mint throughout. The car has traveled just over 2,000 miles total, and with a bit of maintenance, would be road-ready.