The D&D Boarzilla is a recent addition to the D&D lineup that was produced to offer a pipe for the bigger inch motors...hence the name.  D&D targets this pipe at bikes that are 107" and larger but we would recommend that you tread lightly when choosing your pipe size.

In most cases you are better off erring on the small side when it comes to exhaust pipe selection.  I wouldn't consier a Boarzilla until you top 114" or better in displacement.  Check em out below....made for big inch, high horsepower Harley Davidsons.

D&D Boarzilla Harley Davidson Exhaust