This EGT clamp kit is used for exhaust systems that do not have provision for accepting the 8x1 thread of a EGT probe. In this case a small hole the same size at the probe tip is drilled into the exhaust manifold and the probe inserted and held in place with the clamp kit. The clamp kit includes a drilled stainless steel band with galvanised adjuster. A 8x1 metric fine pitch nut is included to hold the probe in place.

(It is no longer a separate clamp kit for the EGT - it is now all-in-one)

For the MGL Avionics EGT Clamp kit, what is the length of the probe cables and if necessary can they be lengthened?
The length of the probe cable is 3ft 10in. Per MGL, if you need the wire extended, you would need standard Type-K extension wire.