This is my favorite site. Everybody riding the baddest bike around. Heres my question. I'm in Kauai, HI and ride everything from cane roads to hairy single tracks and steep hill climbs. I'm looking to add a little horsepower so I ordered a pipe from FMF.(Power Core IV-2)and a Hi-Flo header. Whats everbody out there using and what typr of gains are you getting and do you think it was worth the $.