89cobra5.0

Ok so I have bbk shorty's on my car with what I believe is an old flowmaster h pipe. On the passenger side, the two bolts to tighten the flange are there, but Im missing both nuts to tighten them on top. I cant seem to figure out what size nut I need and I have a bad exhaust leak because of it. Ive searched but I cant seem to find my answer, can anyone help?

mjr46

any local parts store should have them

89cobra5.0

I went to an orchard supply and bought a 5/8 and a 7/16 both with 24 thread (thats what I think I read somewhere), but they didnt fit I think the size is in metric, do you know if thats true? also What part would it be called, probably a dumb ? but is it like a header flange nut? thanks.

Fox23

the thread size could have changed from the heat from the exhaust? just throwing that out there.. Cause i know those bolts and **** are always expanding from the heat..

Liquid_02

Just go to home depot or something like that and buy some nuts of various sizes and threads, won't be fine thread, no use going back and forth for $3 in nuts, just buy anything you think it could be. Mine were 1/2", studs went MIA so I just bought a few 1/2" stainless bolts from a local nut & bolt supply store.

Tony71502

Take the nut off of the header that already has a nut on it.... go to a store, find a bolt that matches those threads, use that bolt to find nuts of the same size thread as you.

Fox23 heat will not affect thread size. Unless your bolt is 300 degrees and the nut is sub zero. But I bet they are both at the same temp.