thinking of going 4 into 1 full system

[terryh]

Thinking of 4 into 1 route as American Dynojet said they would make more power than current k8 stock system with Yoshi Trs cans.Just picked up bike from local Dynojet dyno.The bike has xtre and K&N filter.Bike picked up 9 HP at 10000 rpm and 8 HP at 6000 rpm.Power was up all the way from 2200 rpm.Torque was up 6.80.ft/lb.Would reflash improve this as I would have thought this custom map was great improvement.Low rev throttle response was much improved.What does reflash kit cost and what improvement over power commander 111 usb?What is air box mod and what power are stock headers with cats costing me?The power commander 111 usb fitted appears to be very good to me with good adjustment parameters.