Banks, ISSPRO and AutoMeter are all good guages. EGT guages are not cheap; plan ~$175 for the parts.
Also, the install is interesting. You have to find a location to drill & install the probe into the exhaust stream, as close to a cylinder port as practical. Obviously in a cylinder would be the best up-to-the-nanosecond reading, but problematic to drill & install a probe there
Just outside the cylinder gives a pretty good reading. Downstream a ways allows some drop in temp, so you don't get accurate in-the-cylinder reading, tho you can make useful comparative readings w/more remote mountings. I prefer just after the cast exhaust header, as that reduces influence of changes in ambient temps that reduce readings more in winter than in summer; I don't have to make any seasonal adjustments mentally (as that is frequently a source of much forgetfulness & error; just ask the woman that feeds me, her name is, er, well, uh... was it Judy?
). That location also has complications, though of a more manageable type- if you just drill exhaust tube in place, shavings fall inside & get blown thru turbo, into intercooler. So best to remove the exhaust pipe to drill. Some purists remove & drill/tap the cast exhaust header; they have my admiration.
Mike makes the point that shut-down is an important point in time regarding
EGT & turbo-diesels. For those not in the know on that point, the turbo is oil cooled, so if it is passing 1100 degree exhaust (climbing a mountain), and you pull over and shut down, you will cook the oil that was passing thru the turbo but is now stationary within it (motor oil burns somewhere shortly above ~240 degrees). Long idling has been shown to be n.g. for diesels (truckers do it to keep AC & other stuff going), but a coupla minutes idling after a long pull & before shutdown is in order to keep the turbo oil passages from choking up w/burnt oil residue.
Maybe WRV will install EGT guages @ Homecoming as one of the 3 things?
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Tom, Patty, Hannah "The Big Dog" and Abby Kat, Indianapolis, Indiana 
. Seriously, I have an EGT gauge on my PSD F250....I monitor it all the time, especially when shutting down engine. I would like one on MH...any suggestions/recommendations on what brand/type. The one on my PSD is from Banks Engineering.
I 2nd the motion on WRV installing gauge at Homecoming 
Cons to upstream of the turbo is risk of the probe breaking and going through the turbo 
Down stream no turbo risk but not as accurate. 
Linear Mode
