Simply put, I just remember what people say. You slapped me silly because I had "time" and 600 in my heads..... But now you'll have time and soon to be 1000 in your heads... almost double cost. Now hear me, 1000 is good for ready to go aluminum heads, but again, for almost double the cost you could have had pro maxx - a better quality and flowing head. Isn't it all the same in the end??? Differences are the same, just at different levels of pricing? Not derailing, but just jumped in a little off topic like you did.... monkey see, monkey do :D