just ordered my fujitsubo style y-pipe and i currently have a straint pipe in place of the pre-muffler....here's my question, once the y-pipe is installed, will the stock muffler be capable of evacuating this new volume of exhaust effectively when the secondary outlet opens, or will it be a bottle-neck?


04 6mt Sedan / stock airbox mod / z-tube / k&n panel filter / crank pulley / 18" r/h c2s / s-tein springs