In article ,
John Wright wrote:
No - it's simply the emissions regs were tightened then which means in
practice a cat is needed.

They were tightened so that only a cat equipped engine would pass -
thus ending research in the UK into Lean Burn engines which would not
pass the emissions regulations at that time.

If there was a possibility of them passing after more development, why
would this stop if they had other benefits?

--
*Proofread carefully to see if you any words out or mispeld something *

Dave Plowman London SW
To e-mail, change noise into sound.