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I have a set of 243's that were CNC ported, angle milled and hand finished by Pete Incaudo of VMax motorsports. They have REV valves, 2.08" intakes/1.60" exhausts with Crane 832 dual springs/ titanium retainers. Chambers are 59cc and with stock MLS gaskets SCR was 11.5 to 1. I am open to reasonable offer but will not give these away as I have right at $1600 in them.