Will 2014 mufflers from a street glide fit a 2006 electra glide? and do they have catalyst built in them?

 

yes- 1995 to 2014 physically interchange.

no starting in 2009 on CA and Int'l- then 2010 50 State, the cat was moved to the header pipe

 

I have a 06 EGS and put some 2011 SG stock slip ons on and I love it not loud if you stay off the pipe , but when you lean into it , it has a deeper and louder sound , without the cat. You will like It and you can find them cheaper than Rhineharts or V&H !