FMF Silencer Installation

I bought a turbine core II silencer from e-bay last year and am just getting to installing it now since I just got my pipe. In the instructions for the pipe it says to use the standard mounting hardware for the pipe and silencer, but my silencer has a large rubber grommett on the rear mounting hole which is at least a half inch thick and the bolts don't fit through. The forward mounting hole does not have this grommett. Since I bought the silencer used I don't have any instructions that came with it so I don't know if I should have more mounting hardware. Also the mounting holes for the silencer seem pretty large, a lot larger than the bolts that are on the bike, should I get some fender washers for them.

Thanks,
Nate

I also have some pics that I can e-mail somebody to better describe what I am talking about