Ok i have a 05 Honda 400ex and i am lookin at pipes for it. I am not really concerned about the price i just want what will give me the most power. Right now i am lookin at a HMF bill balance full system pipe, a white bros e series pro meg full system, or a FmF power core 4 with a power bomb head pipe, also i really like looney tuned duel exhausts but i heard that they are all looks can someone put in some thoughts.