Yes I've done it, although slightly reground. They are too big to give low & mid range power it's from 6000rpm & up that they "take off" and still climbing in power at 9900rpm, I got 139hp at the rev limiter. I'm about to go back to the cam grinder & ask their advise & if they can regrind to give me more and wider mid range, I'm not worried about the top end the middle is where the fun is.