Yes, it happens when the catalytic coverter is clogged
It is normal for the exhaust to get hot. It is the result of an internal combustion engine. If the exhaust is red hot then there is a problem, perhaps from excess fuel or incorrect timing.
exhaust?
Engine is running lean.
Advanced timing can cause that to happen
I dirt track race and mine did it once it was because it was running to lean.
The exhaust gasses pass though there, and they're really hot.
it is burning way too rich.
No but an engine running like that can damage the valves.
Engines run by burning gas fumes- fire is hot- exhaust is therefore hot. Hot gases running through metal pipes will make the metal hot. Hence the reason for "Hot, do not touch" stickers on many small engine exhausts.
Turbos use hot exhaust gases to spin the turbine wheel when the engine is under extreme loads(think a big truck going up a steep hill)the exhaust temperatures rise which makes the turbo work harder these raised exhaust temps (on long haul trucks max exhaust temp before the engine must be down rated is 650 to 750 degrees Celsius) it is these temperatures that cause the turbo to glow red hot
If it's glowing red you have a vaccum leak someplace, probably in the intake manifold or the engine is running lean on fuel or possibly too rich as the unburnt fuel is burning in the exhaust.
The back of the turbo, is the turbine. It has the hot exhaust gases flowing thru it. The exhaust gases are 1000+ degrees f. and cause the steel to glow red/yellow when under load.