Gusto's correct
My son and I did a bunch of reed testing including some for HQ Sponsor FAST Racing
Nothing ET'd faster on our asphalt Banshee's than V-Force II's
That only applies to WOT operation. On our stock stroke/unported cylinders with only bolt ons and ported 4mil Serval the V-Force 4's are the way to go. They give up a little on top end but low and mid range stomped all over the 2's.