Installed my lightly used (eBay) 4" Rineharts.
Sounded great, for about 200mi...On my way to work at 0'dark-thirty running 70mph.

Suddenly the exhaust not got much louder, enough that through my full-face helmet that I thought my ears popped.
I stop on the shoulder to have a look what may have come loose and can't see anything wrong.

Tonight I see that the left pipe is missing the baffle. Only the black tip remains with the 3 internal screws completely missing. Can I purchase the baffle somewhere it appears to screw on to the black tip ???

FWIW It is deafening loud without any baffle, prolly way lean as well.

 

You're lucky you didn't lose the end cap too,give Rinehart a call for replacement baffle and screws !!!

My baffle came loose in the muffler after three months,they replaced it !