so i'm looking at these Mahle pistons out and they come in a .25 overbore. I know the correct procedure to honing the h22/h23 but is there anything special to do when boring? Or just bore and then perform the special honing procedure?

 

There is an excellent article about your very question, with the very same pistons you are talking about in the latest in the march 2006 article of Honda Tuning. According to them their is a totally different process and unique machining equipment necessary to perfom the bore. Hope that helps, and good luck!!

 

thanx alot, i'll pick it up