Hi took the mufflers off my 2010 FXD to put some slip ons on but they were the wrong ones. Going to put the stocks back on so I can ride but cant remember which is the top or bottom ones. Noticed theirs a difference in the exit diameter. Should have paid more attention when I pulled them of but wasn't expecting to be putting them back on.

 

Your question didn't belong in the "New Members Area".
It's for introductions. So it was moved in one of the other forums.

 

Thanks a bit new to this.

 

if their stamped with a parts number look it. I have the parts manual but I wont be home for another week

 

I don't see anything on the parts fiche that shows what you're asking.
Is this a US bike? What is the size difference?
I've never noticed any differences in the muffler size on the same bike. Maybe I've been living under a rock for too long.
Anyway, if it was me, I would put them on and just ride it. What could possibly go wrong? Worst case, when you find out the answer you might just have to switch them.

 

I'm in New Zealand bought it here new.

 

Looks like according to ronnie's the front muffler is part# 66868-07 and the rear is part# 66025-07.

Yours are part 39 on this list,
http://partsfinder.onlinemicrofiche....EXHAUST-SYSTEM

 

The muffler with the scratches under it is the bottom one

 

Thanks so much you've sorted out my problem.