Used but servicible 3 and 5/16 by 4 inch stroke Silvolite pistons with rings, and wrist pins. These read .030 on top...but they lie. Actual measurement is 3.340. a couple of pistons have some tiny Knicks on them and they're all dirty but otherwise fine. $125. or trade for pistons that measure 3.248 DM about shipping. Other flathead parts available.