No, it really isn't. There are a number of choices out there. JE, CP, Wossner, for instance. I would never use JE because of their past propensity to cracking wrist pin bores. JE uses a Wiseco forging and the problem was so bad many years back, they decided to change the piston design. Their answer was to add more material to the dome of the piston, not really addressing the original problem and remaining with the original design. Then you have CP, which is affiliated to Carrillo, a brand with good reputation. CP lowers the compression on their turbo piston by moving the wrist pin bore up on the piston. The problem with this is that the wrist pin bore ends up intruding into the oil ring rail, so they give you and extra rail to support the pin more. CP pistons can cause smoke in the exhaust as a result. Not a great design, IMHO. Wossners are moly coated, laterally gas ported, are balanced and come with a tool steel wrist pin. These are features other brands charge you extra for, but are standard with Wossners. We have had stock bore Wossner turbo pistons well over 600 rear wheel with no detrimental issues.
Wossners for a Gen 1 require a spacer plate, for a Gen 2, the standard base gasket. Go with Wossners, which we keep in stock . . . my opinion, obviously. I am sure others will chime in with their experiences, listen to everything you hear, consider the source and make your own decision.
