Checked mine. One's gone, and the other is a little loose (can spin the washer). I've accumulated HD bolts over the years, so I might be able to fix this without a trip to the dealer. Looks like it is a 5/16. Can someone please confirm this, and also tell me the length? Thanks.

 

Awesome, got a link to that bulletin

 

Mine are a 5/16 - 18 thread, thread length is 1 1/2 inch.

 

here is what i use http://www.phatperformanceparts.com/...p/kas-5530.htm

 

Thanks padzani

 

I never had a leak but while changing my slip-ons on my 2010 UC I noticed the pipe moving a lot more than it should and found both bolts gone.

 

Correction: The thread length is 1 1/2 inch for the 5/16-18, Sorry

 

I thought something was up. I tried a 2" & could just get so far. I've learned over the years (I'm 64 & have been a novice wrench for about 52 of those years) when it don't want to go, don't make it go. I'll try a 1-1/2 tomorrow.
Thanks again pdzani

 

I just experienced the same thing on my 2010 Ultra with 9200 miles. I ended up pulling the tranny cover so I could get to those two bolts to tighten them.

 

M1305