Hello Ozbiker69, It's getting cold here in Pennsylvania,USA. It's probably getting nice for you folks down under. Anyway, to answer your question, I have the Screaming Eagle slip on mufflers on my 2008 dyna super glide custom (96 c.u.i. engine) and the stage 1 breather. To me the set up is perfect, great sound (loud but not obnoxious)so it won't wake up the neighbors when you come home from the pub late at night. It has great acceleration and cost less to install. I would recommend the S.Eagle heat shields on slip ons to cut down on any unwanted burns. Good luck my friend, and let us know how you made out.