Discussion
They had to be fitted from new by law, but you can remove them afterwards, but to pass an MOT there will be different emissions regs depending on the age of the car, if you remove the cat, it may not pass the tests, but if by chance it did, without the cat, its OK not to have a cat, I think.
Balmoral Green said:
They had to be fitted from new by law, but you can remove them afterwards, but to pass an MOT there will be different emissions regs depending on the age of the car, if you remove the cat, it may not pass the tests, but if by chance it did, without the cat, its OK not to have a cat, I think.
eh?
I think that cats MUST be fitted to post-1993 cars, and if your car was first registered after some date in 1993, and is fitted with a cat, then you must have a cat fitted.
Fortunately mine is 1990-registered, so the cats aren't mandatory, so they are getting the heave in 2 weeks (approx) pending delivery of new exhaust bits!
Fortunately mine is 1990-registered, so the cats aren't mandatory, so they are getting the heave in 2 weeks (approx) pending delivery of new exhaust bits!
All cars registered after august 1993 (K plate) must have cats fitted from new, and are tested at MOT at a much lower tolerance than pre 93 cars. Unsure if whether if the car can pass these lower tolerances without a cat, does the cat need to be physically present for MOT..
All cars before that, are tested as a non-cat equipped vehicle, regardless of whether they have a cat or not, as such it is perfectly legal to remove it. which is nice, cos my cars are 15 and 17 years old. (althiough the 740's emissions were low enough to have passed the cat test, even without one!)
Interesting clause is that if you fit a pre August 93 engine into a later car, and can prove the engines origins, it should be tested on the lower limits.
All cars before that, are tested as a non-cat equipped vehicle, regardless of whether they have a cat or not, as such it is perfectly legal to remove it. which is nice, cos my cars are 15 and 17 years old. (althiough the 740's emissions were low enough to have passed the cat test, even without one!)
Interesting clause is that if you fit a pre August 93 engine into a later car, and can prove the engines origins, it should be tested on the lower limits.
MrFlibbles said:
They had to be fitted from new by law, but you can remove them afterwards, but to pass an MOT there will be different emissions regs depending on the age of the car, if you remove the cat, it may not pass the tests, but if by chance it did, without the cat, its OK not to have a cat, I think.
eh?
I didnt say what you meant I thought you did, but as today is yesterdays tomorrow, its all perfectly clear.
As has been confirmed(ish), they had to be fitted from new post 93, but you can take 'em off if you want, its not illegal, but your car might not pass the MOT emissions test without them.
chris1roll said:
All cars registered after august 1993 (K plate) must have cats fitted from new
Yep. "K for Kat" is how I remember.
If you have a pre-k vehicle and want to remove the cat you need a "track pipe". If you fancy getting the ECU remapped you can also throw out the lambda sensor and get 10% more fuel economy. If you don't fancy remapping the ECU then you need to keep the lambda sensor.
There's likely to be a few extra BHP once the cat's gone, and a few more if you get rid of the lambda sensor.
If you have a cat failure in a pre-K vehicle then a track pipe will save you a packet.
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