Catalytic converters

72bluNblu said
Everything 1975 and older is exempt in California, no testing ever.

‘76 was the first year for catalytic converters. Not a coincidence.

My ‘74 Duster, California sold car, never had a cat.
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1975. I’ve parted out a few A body cars. The ‘75 models first got the converters and a different floorpan with a bulge to allow clearance around it.