Just got a Gates Cambelt and Waterpump kit off Ebay for a song. £45 including postage instead of £80 from Autodoc.
Box has DKIT-11118 as a reference on it and I cannot find that anywhere online.
Opened it up and noticed that the tensioner pulley is a Gates T41139 found here:-
https://www.autodoc.co.uk/gates/7957270
as opposed to the T41140 here:-
https://www.autodoc.co.uk/gates/7675155
which to all intents are purposes is exactly the same surface and dimensions as the correct one as specific as part of this kit with the correct reference number:-
Complete kit which shows a T42070 idler pulley - you can see all the part numbers a KP15524XS kit should have - but the supplied kit contains an INA affair (which I have yet to check dimensions on).
https://www.autodoc.co.uk/gates/7025612
I really could do with changing the cambelt tomorrow as it really isn't good and Jim has already berated me AND verbally spanked me...
No coding on the waterpump other than a number which bears no correlation.
Having said that, engines are much of a muchness and most manufacturers are not going to redesign the wheel when a standard part already exists.
The forums thoughts, as ever, are greatly appreciated.