I bought a cool runnin thermostat from courtenays, it was about £23 quid but cant remember what type.
I rang them and they were quite happy to explain the difference between the cool runnin and the normal one.
I was thinkin of gettin the spec and just goin to vauxhall and buyin one, thus savin a few quid, but couldnt be
arsed in the end. Why not just ring up courtnay or regal and ask them ,shouldnt be a big secret.