This is a complete set of six (6) standard bore Wizard Pro Stock Dual Ring Pistons for the Mercury Racing 2.5 Liter V6 2-Stroker Outboards including the Carb 245 HP, EFI 260 HP ROS, 300 HP, and both 280 HP Race and Consumer Engines with steel sleeves. 
 
Each Wizard Pro Stock Piston Kit includes six (6) pistons, six (6) slip-fit wrist pins, twelve (12) piston rings, and twelve (12) wrist pin clips.
 
Before installing ensure your Steel Sleeve Cylinders; 1) are the correct bore and are nearly perfectly round, 2) have cross-hatching from a hone, to retain oil and lubricate for the pistons, 3) should not be glazed, which is a polished, shiny surface, and 4) should not be chipped, nicked, cut-through, or have worn spots.
 
Contact Mike Hill at STVracer@yahoo.com with any questions or additional needs.