Soft or hard bolts for exhaust flange?
See no point in G8's for exhaust. Been using G5's or SST with brass nuts for over 15 years. Never had one come loose when it shouldn't have (one system has ~30k punishing off-road miles on it), and never had one not come loose when I wanted it to. Never had one strip, gall, or seize either.
FWIW I build all of my own exhaust systems and I build them with flanges so that they can come out in sections as needed for other work. As an example the system under the Valiant has a flanged connection at the head-pipe to mid-pipe, mid-pipe to muffler, muffler to tail-pipe, and tail-pipe to resonator, so 4 flanged junctions with 3 bolts each.
See no point in G8's for exhaust. Been using G5's or SST with brass nuts for over 15 years. Never had one come loose when it shouldn't have (one system has ~30k punishing off-road miles on it), and never had one not come loose when I wanted it to. Never had one strip, gall, or seize either.
FWIW I build all of my own exhaust systems and I build them with flanges so that they can come out in sections as needed for other work. As an example the system under the Valiant has a flanged connection at the head-pipe to mid-pipe, mid-pipe to muffler, muffler to tail-pipe, and tail-pipe to resonator, so 4 flanged junctions with 3 bolts each.