ok i got my headers installed no problem then im puting on the bolts and one of the bolts threads are a little messed up so i put the bolts on and then tighten but then need to remove headers again for something else. so i took bolts off but one bolt broke in half i also let the engine run till worm to see for a leak and there was. so i decided to take off and fix but the bolt broke in half and is stuck in the header is there anyway i can remove this?? i just bought them could i return to store? is there a shop i can take to?