Bought out the remaining piston sets from a defunct speed/auto parts store here in the Detroit area. Up for bids is the set of Rock/DNJ in the first pic( box on bottom). I also show the shelves I bought and all sets will be listed as I decode them. According to the website, these pistons fit 2001-4 Chev Tracker&1999-05 Suzuki Vitara. These are for the 6 cylinder models of the aforementioned. These appear to be Standard bore.  Good for a cheap rebuild! Thanx