Power Now or Boysen Power x Wing?

[CRF119]

I am looking for more HP on my 2008 CRF450 already has Full FMF Titaniam System with mega bomb header. Boysen Quick shot 3 is already on the list but just trying to decide between the two main types of power valves.

http://www.boyesen.com/cwo.php?store...roduct_id=2351

http://www.scaryfastracing.net/4_stroke.htm

From what i have found Powernow Plus claims to produce more power when both before and after carb inserts are in place then the Boysen Power Xwing. The X Wing sits along way before the carb and doent reduce intake diamerter but claims less gains in HP.

Has any body used eaither?

[ArcherWC]

i have used the power now, I noticed a gain down low, but it will give you no more HP up top