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After the turbocharger on a diesel there is not a lot of heat left over.
When driving at 60 mph under light load there is maybe 500'F EGT before the turbine and only about 400'F after.
On hills and during passing EGTs may climb to 600'F.
After that last turbocharger (if using more than one) you will want the exhaust be as free flowing as possible.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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