This is the one I'm using now, it's IDENTICAL!!!! to the one that was in the Blaster when I got it and I was told that it was a "WIESCO"!, I changed it at about 125hrs because I sucked some sand and it stuck the rings (and I was installing the stroker crank), NO failure of the piston, it's also the piston that came with my Vito's 240 kit that I have, that piston got FRIED! once again not the fault of the piston, THREE! pistons and two cylinders on my brothers Blaster gave us the SAME EXACT FAILURE, it has NEW! crank seals now! we'll see???(I still need to get off of my ass and send that cylinder to Denny for porting!!)