What length bolts go where? I got the headers used and don't know which ones go where.

Thanks

 

are you talking about the header to head bolts? these should all be the same size and length. I think they are 3/8 by 1" long. The collector flange bolts should screw into the flange on one side and the stud goes through the flange on the other side and a nut screws to it to hold both pieces together. I think these are 5/8 nuts.