I have an '06 Ultra that is bone stock. I would like to replace the exhaust with true duals, slip-on's, stage one Air cleaner and a Dobeck. Since this is going to take some time ($) the parts will be ordered as time goes by. I've acquired some true dual headpipes already in great shape. I do not know what the brand is at the moment. I've also got an extra set of stock pipes. The pipes each have two plugs in them, with the front pipe plugs drilled out, the rear plugs unmolested. My main questions are can I install these duals and pipes without disturbing the A/F mix until I can get a stage one and Dobeck installed? I understand I can install exhaust and things are OK, but once I install stage one breather kit I have to richen mixture via Dobeck or other tuner. Does this also apply with the true dual headpipes?