ok so currently on my 09, it has a jardine gp1 slip on and link pipe. i like the sound being deep, its a little loud for me but i have gotten used to it. the bike seems to run very well with it, but seems like it doesnt have much low end below 8000 rpms. i plan on getting the ecu flashed and prob gonna ditch my pc3, so i was wondering whats the best style exhaust for racing? i plan to lower and stretch the bike in the next few weeks. i hear if i put a normal exhaust on i will gain low end but lose top end. any thoughts?