Well, this is sure to open a can of worms, but here goes. FMF Q4 really woke up my 08 wr450, and my plan is to get a power bomb header to go with it (based on reading good things about it on here). However, I will have access to a stock YZ450 header (also and 08) so I think "would the power bomb perform better than free stock yz"? For that matter, would either one be an improvement over what just the Q4 made? And I don't need top end hp at the expense of low/mid.