I have a small crack on my passenger header and It's getting welded today. Last time my passenger header cracked it was bad and I just replaced my headers. I thought maybe it was caused by bad motor mounts. So I changed them out. Well my headers have been on for a little over a year now and the passenger hearder cracked again! I think it might be from playing around and happend during a downshift. But what would cause this? I am stumped and afraid that it will happen again in the future unless I figure out the cause and fix it! If not then no more hard down shifts for me!!!!!!