Need a bit of advice to make make mind, after blowing the engine in gen1 last year I picked up gen2 but this one got cat still in place with short akra can, I missing that sweet pop when going up the gears now but not sure if previous bike engine damage could be result of decat system? Now the first valve on headers pipe rattle a bit on low revs and I?m thinking of danmoto headers (no valve) and decat link pipe. What do you think is it going to be too loud and i should leave cat in place or get rid of it? Thanks