just bought a de-cat for my classic sport.

do i need to alter anything like fueling etc or will it just be a straight replacement job?

jamo

 

Does anyone know what the police can do to you if you fail a road side emissions test and its found out you have fitted a de-cat? Also if you tell your insurance you have a modified manifold/exhaust system does that cover a de-cat or does the fact you have to have one to pass a MOT make it null your insurance?

 

ttt

 

They can tell you to get it rectified and give you 14 days to do so and have it tested at an MOT station.


You will have to tell your insurance company, not doing so can lead to them invalidating your policy at a time when you need it most. However for the majority they are not interested in what has been done to the exhaust, they will simply log it as an exhaust modification.


I cannot comment on the fueling when decatting a sport, certainly with the turbo you can decat without worrying about having to setup the car up for it, and I'd be suprised if you had to on the Sport, at then end of the day, decatting is only helping the car to breath easier.

 

I'm not really up with sports, but it should be fine. A reset of the ECU would help it learn the new fueling values a bit quicker.

As for legalities....grey area

The MOT only prooves that the car is roadworthy ON THAT DAY only. If plod test your car and find it to be unroadworth, at the worst they can give it a prohibition order. Meaning that you cannot drive from that point onwards. More likely they'll give you an notice to get the car rectified and re-tested (at your cost).

When they test emissions and it fails, just plead ignorance, and say that the car has not been running quite right and I was going to take to garage to have it looked at next week. Or say it passed the MOT ok etc. Or probably the most wise: Accept what they say and DON'T say anything and dig a hole!

The police aren't going to tell if a cat is or isn't fitted, the only exception is if they decide to jack it up and look underneath. There is talk of more stricter checks, and exhaust sytems and cats must have visible "E" numbers and stuff to ensure they are correct and conform. But if the police decide to impound your car, so it can be be examined by a specialist, then I would seriously question it's morals in use of resources when there are rapists, theives and murderers running amuck!

Insurancewise, well technially yes, if the car won't pass it's MOT then it is not roadworthy and thus not insured. But I'm not sure where it leaves them if you declared that you have a performance or a modified exhaust system, as that is what a decat is!

But once again, if the car is in an accident - it won't be because of the exhaust! (unless it fell off ) The only time you would have to seriously worry about the car being decatted insurance wise is if you were involved in a serious accident that has required police investigation and your car was inspected to assertain it's condition. But I'd doubt that they would be specifically looking to see if a cat was fitted

If anyone elese has anything more specific I would like to see it myself

 

cheers for that!

ive told my insurance company, and they didnt mind. no extra charge.

jamo

 

Ali-B
"Insurancewise, well technially yes, if the car won't pass it's MOT then it is not roadworthy and thus not insured. But I'm not sure where it leaves them if you declared that you have a performance or a modified exhaust system, as that is what a decat is! "

Interesting point, but going by that way of thinking if you have a reverse light out you won't pass an MOT but that doesn't null your insurance....

 

The reversing light is not part of the MOT test.............as yet!!