Since I’ve owned this 4.2 it’s had an exhaust leak and I believe I found it. A bolt is missing from the exhaust. Pictured here is the header and the missing nut. Its located Where the exhaust attaches to the header. I can see some sort of bolt still in there but it is not attached completely to the exhaust. No idea what size bolt and nut is needed for replacement. so any help would be appreciated. Thanks!!