04-05 dyna seat due to frame changes. seat has a longer seat bracket.

Exhaust only fit 00-05 dynas. The 5 speed has a different hole pattern than the 6 speed. The exhaust hangers will not interchange without modification.

no o2 bungs in stock headers.

You can convert a single disc to a dual disc using the 49mm lowers and Brembo Brakes from a touring line bike. You will need to either machine a new wheel or buy a new dual disc wheel.