The dealer I get my parts from said that the Vertex name was bought by Wiseco. He really liked the vertex, and now uses the Athena piston, which he swears are still made by Vertex. If not they are of equal quality in his opinion. He said the Wiseco's are forged and are not as tight on clearances because the need to have room to swell when they get hot. I am running a Vertex replacement in my O3 EC250 with good success and I'm ordering a Athena today for my 06.
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