Wonder if the v line of pipes could use some more developement now, they are pretty tho 

When you look at Dyno pulls LT500-87_090 Q2.drf and LT500-87-QV2_025.drf done 5 days apart and no change to the quad, but you see a 2+hp swing. So your graph / dyno has a spec of +/-2hp. With that info, you don't get to excited with 4hp gain because you didn't cover the % of dyno graph error. Then add all QV2 runs done with 440MJ. Both DCS done with 420 and 330 MJ you end up with not a bad pipe in the bunch. But no clear killer. That day, that jet could make each pipe look good