Hey guys, I tried searching for this info, but couldn't find it. I have a pretty much stock 99 400. I was at a state OHV park this weekend, and a ranger told me I don't have a spark arrestor, and my stock exhaust was too loud. So, I guess I need to upgrade to aftermarket. Any suggestions on what to get? I would like to spend less that 500$ on a full system, so I can get around the oil filter problem. It that much money going to get me a quality set up? Someone suggested FMF Q. Thanks for the help, and sorry if this is a beaten horse topic.