4 replies to this topic
  • rudiedj

Posted June 30, 2008 - 10:03 PM


CAn anyone please explain to me firstly, how they work (technically) and what the effect is?

  • tweav

Posted July 01, 2008 - 12:22 AM


they are a small expantion chamber. they help smooth out the pulsing exhaust . this lets the pipe flow a little more.

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  • mikeythefokker

Posted July 01, 2008 - 01:11 AM


They do work. I have had both on my 07. I had the powerbomb first, until it had a disagreement with a rock, and then I got the megabomb. The power difference between the powerbomb and stock is pretty big, but the difference between the mega and powerbomb is not as drastic.

  • w00dsRider

Posted July 01, 2008 - 09:53 AM


They also have the benefit of lowering exhaust db's as well as adding a bit of power.

  • gasgas250

Posted August 23, 2010 - 10:14 AM



I want to improve bottom-end as well as reduce noise and I was told that a FMF Q4 with a Megabomb header to my 09 WR450 will do that.

Do you know if this header will block acces to oil filter?


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