This is a top overhaul kit featuring 2 new aftermarket  pistons, moly coated & hard crowned for low friction w/dual rings, pins, circlips , full major overhaul gasket w/ crank seals  kit as shown. This set exceeds the MFGs specs , Designed to replace the oem elkos in all respects.

These are becomming hard to get, get while they last

 Smoother running due to better balance, stonger and better heat transfer. These are hard anodized crowned  and feature moly coated skirts for reduced friction and heat.

We run em in our trikes and use them in our shop for the past 9+ years

This is set is for 67.5 mm std bore  447  rotax