Porting made easy! Simply drill a 3.5" hole in your bag, bolt the plate in with the included hardware and gasket then slip the elbow in and tighten the set screw, once you've decided the best position and length for your bags silicone/glue it in. The included elbow gives you 7" of length which is easily extended with standard scedule 40 pvc pipe. 
 
Not sure where to start with length? Give one of our techs and call and they can do the math for you!