Mandrel bending is smoother and keeps the overall diameter better than crush bending. A smoother flow results in more power and panties dropping.
TapaTalkin'
Sooo ..................... if I happen to get this mod done for mine ummmmmmm I should go sans undies from then on ahem ahem ??? I'm seriously thinking of getting this done since it's not an expensive mod but makes a nice difference with the sound !! I had an x pipe on one of my previous rides and I luuuuved it ...... but kept my undies on wink wink !!