no good explanation why not to, just have never done it on street engines, probabley because it does tend to flatten exhaust note which some question. soon as we hooked this mod up busa owner said ex sounded different as i had told him it may, first timeslip got him over that. vent all street engines to atmosphere/cap airbox. does it make a difference on strip? my results positive, should do same on street. simple mod, home depot has the tee and straight coupling, parts store has the hose.
Last edited by gaz; 05-16-2018 at 09:18 AM.