I run the magium 120 in my Ryan sta and Ive used the os 90 degree and the stock elbow that comes with the os 120 non pumped and joined them to exit out the bottom of the cowl, added a 3/8 copper tube bent to exit the bottom center of the cowl, using jb weld and drilled thru the fitting and pipe and used a 440 bolt and nut, no jb will not stand the temp but helps seal the pipe, I also turned down the end of the pipe and cut it off at an angle to devert the exhaust downward. hope this helps and it does work. JIM