well, if you have your heart set on this you will probably take your head off and check your pistons for valve reliefs. I have heard that honda got lazy and put the si or dx pistons with 16 valve reliefs in the hf block. However someone on here took his head off and told me his only had 8, seeing as that i am too lazy to check, i will just take his word for it. But hte best hting to do is to check yourself.