These are rebuilt original heavy duty Shocks for 1963 Z06 Corvette, 1964-65 F40 Corvette, or 1966-67 F-41 Corvette. The bottoms have some minor pitting but have been cleaned and painted- and are very nice. Rebuilt/Tested by retired Bilstein suspension Engineer. re-Welded and knurled per original factory look. new seals and shaft, these are single action and very stiff on the rebound as per original Factory specifications. We have several dates available. Contact us for availability.