Muffler question?
 

I have a 1987 Big Bear with a "see through sick muffler". I changed it once with an aftermarket pipe about 12 or so years ago. Looking at my options, I see the gasket and spark arrester are sold separately most of the time. Since it's been so long, I remember the gasket fits betweent the muffler and exhaus pipe, at the joint.
What about the spark arrester, my memory fails me if it was included in the aftermarket muffler I bought. Can someone explain to me where exactly does this beast go? Does it fit inside the muffler, at the end, etc.

Thanks in advance anyone, appreciate any help.

After more searching, ordered a K********x universal (036451) that should fit. Looks like the one I presently have on now. Thanks to all for viewing.