Guys I have a 2008 FLHX Street Glide that is stock except for Vance & Hines Monster Oval slip on tail pipes.

I want to go ahead and add a TRUE dual exhaust system that will allow me to use the same tail pipes.

It appears that I will need some type of computer download or fuel management system. Where can I get these items and what do you recommend?

Should I be doing the air intake at the same time?

Can I do this or should I leave it to the dealer?

Thanks in advance