There Is Only One 254-MPH Callaway Sledgehammer, And It’s Up For Auction

The one-of-one Callaway Sledgehammer C4 Corvette was built to do two things — crack 250 mph, and not fall apart in the process. John Lingenfelter blasted past that objective on October 26, 1988, reaching 254.76 mph. Then the car sat in museums for about three decades. Now it’s up for sale.