I'm planning to hack a set of porsche mufflers with the pse mod. The first picture shows a 1" piece of pipe across the intake and exhaust. The second picture (with the red dot) shows an elbow welded. Does anyone know if this part is attached to the exhaust or intake? How much louder will the sound be with the extra elbow? Some guys reported using a 2" instead of 1" across the intake and exhaust. Anyone running a muffler like this? How do you like it?