Ok today I picked up some A/C parts from a friend and He had a old Airmass header lying there in the pile of **** he had stored upstairs and I asked him what he was doing with the header and he said **** it is trash so I took it home and it is cracked badly but I was going to try and JB weld it well I have already done this but not installed will this worK?????

 

i think we arc welded my header because it was cracked. it worked but its a 9 year old header, its getting bad

 

JB weld might be a temp solution (if a solution at all), but eventually you'll need to get it welded together. even then it won't work at its optimum...