I have been doing a lot of R&D with different reeds and cages for about two years know. There is one company that stands alone when its comes to product support and the product they sale.
Have any of you heard of G3 Power Curve Reed Valves? This will become a house hold name sooner or later. I purchased a set of them from William Holgren of 1 Dir Racing 858-679-3288
I have in the past tried Delta V-Force, FMF, Boysen, etc. None of them can match the performance gain of the G3 Power Curve Reed Valve, and the best thing about them is that they are adjustable. Not one other company can offer this.
I was using V-Force untill know, I had to jet up and all most 80% higher to get my plug color back and the performance was unbeliveable. I have only just begun to reach the full potential of my Banshee engines setup with the G3's.

If any of you are looking to purchase a new set of reeds or cages, it will be in your best interest to give William Holgren a call, you will never go back to your old set up.