Exactly what he said ^^^^^^^^ Coming back from Skeggy mine was missing at about 26psi so im gonna hav another play with the gaps again. These plugs have been discussed so much recently and it seems that the only plus sides to them are cost and the fact that they're a really cold plug....but thats where it ends, nothing special about them with regards construction. Dont rate the champions my self tho, tried both grades and mine didnt like either. Altho Cossie engine's are weird....seem to have a personality of their own....on very similiar specs, some engines like certain plugs whilst others hate them