Hi - I have got a K plate GSi that doesn't have a Cat. It's manufacture date is October '92 and I thought it should have one. However its gone through 2 M.O.T's since I've had it with no probs even tho I thought it would fail & I've not long fitted a Mongoose stainless system to it. Can anyone tell me when they started putting cats on Nova's coz I'm sure I've heard of J plate SRi's etc with them on???? Cheerz