righty tighty.....lefty loosley
.........the down pipes only being on for 12 mths is going to help,to make things a little easier soak the studs with gt85 or similar every day for a few days before hand,reduce the risk of anything going wrong,when undoing the bolts/nuts, a little at a time , dont force things, ease them off loosening ,tighten a bit at a time.......loads of threads on downpipe removal on here well worth taking a few minutes reading through before you start
.....best tip of all.......take your time and plenty of tea
....good luck and keep us posted