For Christmas, my son surprised me with a FMF Q4 for my 04 WR450. That has me thinking about also changing out the header. I ride mostly woods and trails. From what I see, it looks like the FMF Megabomb is a better low to mid-range power producer than the Powerbomb. Is that correct? I've also been thinking of swapping in a Stage1 exhaust cam for improved bottom end. Will this upgrade affect my header choice? I did search the forum first...saw a lot of YZ vs. PB header info/debates. That's not what I asking here...just MB vs. PB comparisons.