Catalyst question.

[SO•Audiojack]

As far as I know, in Finland cars are so called "low-emission vehicles" only if newer than 1996 or if they have a mention of it in the registration papers.

Cars that are not "low-emission vehicles" can pass MOT without a catalysator if they pass the MOT emission tests (the regulations for the test vary with a cars age, cars newer than 1986 have stricter regulations than before that and new cars with OBD systems have even stricter regulations.)

Nobody cares whether or not you have a catalysator when you're not in the MOT though so people usually just take it out and stick a catalysator replacement pipe in there... When inspection time comes, just unbolt the replacement pipe and put the stock cat back there (and maybe adjust the engine management if required to not burn the catalysator immediately depending on the level of engine tuning and systems like launch control and antilag.)