Yes,Vforce3 for KX250 works just fine!
Very easy to get perfect fit between cage and manifold ?cause
you can "disambly" it and trim it very easy with dremel and devcon.
I will put my bikes on dyno soon and compare what combo(pipe/intake) does what for power and powerband.
Pipes:stock,shorted stock,SPES,PC and DOMA.
Intake:stock,modified stock,Boysen,Vforce,Vforce2 and Vforce3.
and then stock carb,modified stock 41mm and Lectron 44mm.
Even what Powerblade and Reedspacer does.