This is how I purchased the bike.
What do I need to buy to go back to stock? Just the rear slip on part?

 

Why are you wanting to go back to stock? You need to see if it's got the stock headers all the way back or if it's a full exhaust, then you can go from there.

 

Its way too loud in the morning.
What exactly do I need to check for? How do I know if the headers are stock?

 

Send Me ya Exhaust , Ill send Ya my Stock , Then Youll Be Back to STOCK !!!! Lol ,
If That Two Bros pipe is a Slip on , unbolt , at the bottom where the headers and exhaust meet, then bolt on ya stock !! and thats It

 

Lets say the header's aren't stock, any thing wrong with throwing the stock slip on back on?

 

no at all , u might feel a lil difference in performance, But with aftermarket headers ya bikes still gonna be a lil louder than completely stock

 

how is it just loud in the mornings and not any other time???

 

yeah!!!! you sure it's not just the loud sound from a cold start?

 

It idles at like 3k rpm when its warming up. Sounds like a jet engine!

 

+1! my 3k idle sucks in the morning.. it's cold, so it's loud. and the neighbors glare... if i keep it in the garage and warm it up, it echoes throughout the house, so I don't win either way haha. I have a scorpion titanium exhaust, and it's a pain.. damn suburbs.