on a dyno my old motor gained 8hp from going from rockets to shearers. on that particular setup, not all are probably going to be that way.
basic comparsion. rockets are big, will or can burn your legs. rocket chrome was very nice. i cut my silencers down about 2 inchs, other cut more off. were pretty long imo. had to run special clamps cause the tubes were like 1 1/8in most clamp arent that big.
shearers plumbing run over the airbox so it hard or almost impossible to run an air box. shearers are far from being quiet. so if noise is an issue well good luck. shearers chrome is ok.
never had a set of cpi.
:shrug: :shrug: