Exact replacement. Just installed, so I cannot comment on longevity, but if they work like Champions of the past, I bet they will last a long time. Gap nearly exact and the same on all plugs ordered (6), so could install without fiddling with adjustments. One had a minor manufacturing flaw that prevented it from easily going into my socket wrench, but did not impact performance of the plug.
Rating: [5 of 5 Stars!]