street legal banshee

i have a stock displacement bottom end with a pro cool head w/22cc domes and a single 35mm carb what kind of power gains or losses will i get switching back to duals and will duals be better for flat trackin??

i have a Trinity racing Stage IV billet intake, 34mm kehin carb wit TORS deleted, and throttle cable with thumb throttle, and pro design billet air box plates and k&n filter with stock air box i am looking to trade for a dual 30-34mm set complete with intake and filters and all please contact ben at 618 334 1321 or on here

trade for a single 35 kehin complete set up stage IV intake with boots and filter box and k&n