This is a WSM piston kit for Johnson and Evinrude outboard motors. It fits the 60-75 HP 3-cylinder looper engines. It's standard size (STD) with a 3.00 bore. The kit includes what you need for one cylinder. Part numbers: 100-104K, 0387284, 5006751. Brand new. If you're rebuilding a looper, this is a solid aftermarket option. Made for those 3-cylinder loop-charged outboards.
