Was down in good ole Detroit earlier this week and saw something really cool. I was not allowed to take pictures, so I'm on the honor system here. Anyway, got to check out a BOSS motor up close and personal. I'll skip the block talk and go strait to the heads. OMG!!! These things have got some SERIOUS potential! Easily better than GM's gen IV. The factory cast heads flow ~350 cfm @ .600". Ported ones flow more than 390 @ .600", and peaks over 400. Lift can be more than .750". If/when someone decides to squeeze one of these in a mustang, look out!