Mine were made in May of '15 and installed May of '16. Previously I had Blockleys dating 2006! Two sets. One set checked so badly due to improper storage that the dealer took them off and gave me another set, same date. These didn't check and I wore them out. The Coker line uses a modern polymer that seems to last three times longer than the Blockleys which may be using a polymer whose formula dates back to the 30's! dunno
