Just getting ready to take the quad up to Gorman for a run and noticed the spark arrestor from my new White Bros E2 is missing. Only been riden once at Glamis so I am hoping posting here will help. Thanks crew!

your the second one with this post with the same pipe. hope you find one, ihavent seen it, but i have seen alot of white bros end caps in the dunes and on the tracks. seems to be a design problem with that pipe, i know i haven't been totally impressed with the way mine is built

i had the white bros. race ser. pipe on my trx450r and had no problems on losing it.

is it on the spark arrestor pipes only?

I dunno, I just see alof of the end caps layin around, they are held in with one bolt, and they arent anything near a precision fit, so they rattle around and the bolt eventually backs out if you dont check it now and then. personally my pipe; the tab for the frame bolt broke off. The billet alumn. mount for the can is loose and cannot be tightened and it rattles around and makes a terribly annoying noise. I haven't had any issues with my end cap falling off yet (I rarely run the spark arrestor cap), but have found the bolt very loose on several occasions

Yeah there advertising says one bolt for quicker removal. Too dang quick if you ask me. I had checked it and used locktite as well as I was not comfy with the fit.