>>My local centre, out of curiosity, did a pre-cat test on a 1936 Riley and found it easily would have passed.
My old Kia had an upper Lambda limit of 1.3 (it had a carb and cat). The tester used to mutter under his breath when it turned up each year. It would initially fail the emissions, then they had to go and read the instruction book and enter the appropriate parameters. I always wondered what it would do without the (tiny) cat.
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