Depends what you want to use your RB for, i use mine for fast touring and use the Franspeed tourer, it produces 22+hp at 6,500 revs on the dyno, a race pipe will produce better power but higher up the rev band, for the road i would doubt you,ll need more than 20 hp no matter how mutch gear you carry,

. its the best kit i,ve ever used, by a long way.