My Pre-cat Griff and MOT emissions

[unclemark123]

I have just picked up a K reg 4.0 Griff. Registration doc states it was first registered 13-10-1992. It does not have cats fitted. I believe cars registered after the 1st August 1992 must have cats fitted. Can someone please explain why my car does not have them, and how it passes an MOT?

[unclemark123]

Thanks. was just reading that in the mean time. If you check the annex you get the section as in the pic:

So, looking at the notes, the 4th, 5th, 6th, 7th & 8th character in the chassis number must match one in the list to qualify for the more stringent emissions test. My digits are DGN4P1, which is not on the list, so I conclude the test limits are:



Agreed?

[unclemark123]

Thanks

Next question, if I LS swap it, is/are there any regs that change the above?