Anyone wanna post their number and give me some quick advice on this. I removed the old housing where the filter mounts to because it had a small crack, and the new [used] one I was about to put on did not have this machined spot that the old one had, and I just need to ask a couple questions, there are no TR guys around here that know anything about it. I've been trying. I've tried to contact a couple vendors but they haven't had the right people in to help out. Thanks 
