ROTFLMFAO!!!!!!!!& #33;!! They bent the tubes inward to give me clearance because I complained about that also, so next to each bolt there's about a 1/2" dimple in the tube. I noticed when I tightened the flanges I stretched the hell out of the bolts so I'm sure they'll need to be replaced if they leak. The other thing I didn't like is they gave me stainless bolts with stainless lock nuts. That's a big no! no! I put nickel anti-sieze on them to keep from gaulding but will probably go back with carbon steel next time. I don't know why they didn't make the collector flanges a little larger to compensate for the bolt to tube clearance problem. Sorry to hear all your problems, I feel your pain too!