Hi all I have a 2012 FLHTC I would like to put on a 2008 Street Glide Stock exhaust. Want to stay stock and like the looks of the street glide exhaust and because I already have them. My question is will the 2008 slip ons cause a problem because of the different sizes in engines? one of the 2008 pipes is like the 2012 pipe the other 2008 is more restricted .