The legality of de-cat pipes for road use...

[ChristianM]

MJK said:

Tony if your MIL lamp hasn't come on (with DCP) then your emmissions must (just) be in tolerance. You may well find that you'll pass an MOT with the cat off.

I have a few question regarding CRPs (sparked partially by tony fitting his) and I have heard a few different opinions from random people but no one was 100% sure on how the law affects de-cating a car.

1. Is it just a requirement for a cat to be fitted to cars [manufactured after 1993] to have a cat at point of manufacture and MOT only - i.e. by taking it off after MOT you are not violating the law.

2. Could post 1993 car (in thoery) pass its MOT and be road legal without a cat based on emmisions being low enough?

3. If a cat is removed after MOT and you have emmisions checked at the roadside or you have a serious accident and the car is taken away for examination - how is it dealt with (i.e. what is the concequences - fine/points)? - I believe if you kill someone without a valid MOT (not that i'm planning to) you can be in real trouble with the law.

Does anyone know how it works for sure?

Cheers!

>> Edited by ChristianM on Tuesday 8th November 17:56

[scuffham]

ChristianM said:

MJK said: Tony if your MIL lamp hasn't come on (with DCP) then your emmissions must (just) be in tolerance. You may well find that you'll pass an MOT with the cat off. I have a few question regarding CRPs (sparked partially by tony fitting his) and I have heard a few different opinions from random people but no one was 100% sure on how the law affects de-cating a car. 1. Is it just a requirement for a cat to be fitted to cars [manufactured after 1993] to have a cat at point of manufacture and MOT only - i.e. by taking it off after MOT you are not violating the law. 2. Could post 1993 car (in thoery) pass its MOT and be road legal without a cat based on emmisions being low enough? 3. If a cat is removed after MOT and you have emmisions checked at the roadside or you have a serious accident and the car is taken away for examination - how is it dealt with (i.e. what is the concequences - fine/points)? - I believe if you kill someone without a valid MOT (not that i'm planning to) you can be in real trouble with the law. Does anyone know how it works for sure? Cheers! >> Edited by ChristianM on Tuesday 8th November 17:56

1) if the car needs a CAT to pass an MOT it's illegal to remove it for road use
2) Theoretically yes, but in practice 99.9999999% of cars, no.
3) no idea, but it's probably bad news