By the way, if you’re ever on the road and loose the 7mm nuts from your exhaust header, find a Kubota dealer, their tractors use 7mm studs and nuts on exhaust headers and the nuts are lock nuts. I was riding with a friend who works at a Kubota dealer on Sunday when mine decided to depart the studs, who pointed this out. Unfortunately, no dealers open near buy, but we were able to find someone with a couple of 6mm nuts and a tap&die set, drill press and a 7mm tap. Most metric tap&die sets have 7mm, most often, never been used before.
Mike