I've dynoed about ten baggers in the past couple months with 103ci Stage2 kits. The same 10:1compression, 255cam, air cleaner and stock cylinder heads, but with various exhausts. Nothing has yet to outperform the gutted OEM header pipe with 2.250" baffle mufflers. So if you know someone that just bought themself a new bagger and wants to pick up power and sound, fill them in on the info. Tell them pat told you, and have them send me some of the money they saved for beer!