I heard that mahle motorsports has come out with an awesome set of pistons for the h22. They claim to add 30whp because of the coating around them that makes them more suitable for the unsleeved carbonfiber matrix that is the h22. did anyone else see the article in honda tuning? Does anyone know anything more? Sounds like a rediculously easy upgrade.

 

they ahve been out. And no, its just like any other forged piston, just with a special coating on the piston skirt allowing it to travel up and down the bore without scarring the cylinder walls.

you should go here:
https://honda-tech.com/zerosearch

and type in Mahle pistons in the archives and recent topics. You will find lots of useful information.