This very conversation, for years has been my complaint about people who make Mopar aftermarket heads. They are ALL the same. Not a nickels worth of difference in any of them really. Sure maybe this is a little better and this is a little better and so on. But we have a ton of heads in that range all fighting for a share of the market, with little potential HP difference from top to bottom. In my opinion, until you make the jump to B-1s........it just really doesn't matter