To me if its a rcae eng then ATI seems to be the best. But for a mild street/strip car like what I do I went with a Pro Sport balancer from Mancini and its not to pricey and has held up great on my 493. But remember I dont go racing every weekend and I dont street race. I drive my car alot and race it one or two times a year most of the time. Its SFI certified to like 18,000 rpm and I dont run over 6500. So its fine for what I do but all out race I would run an ATI. Ron