While rally wheels were standard equipment on the 1967 Corvette, there was an optional wheel offered for the final year of the Sting Ray. RPO N89 was designated as “Cast Aluminum Bolt-on Wheels” and 720 buyers selected the pricey option, adding an additional $263.30 to the invoice. Fast forward 40-some years and now an original set of Kelsey Hayes sells for big bucks. How big? How about $20,000!