The other day i pulled my header off to get some welds fixed on my POS dc header and a stud pulled out with the nut. I went to reinstall and it seems the threads inside the head are stripped. Whats the best solution? Re-tap? With what size? And where would i find the right stud to fit? Heli-coil? Its one of the middle studs and it doesnt seem to be leaking but its just on my to-do list. Thanx in advanced!