04-05-15, 07:04 AM
What you want,as already suggested, is a set of 8 dome headed stainless steel nuts. If by any chance your studs are too long and make contact with the ends/tops of these then simply fit stainless steel plain washers between the exhaust flanges and the nuts. These nuts will prevent ingress of water/dirt and avoid future problems if you need to remove them again. I definitely wouldnt use nylocs in this application due to the extreme temperatures in this area. Dont forget to use light coating of copper grease on studs. :lol