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law on decat pipes?



  VaVa
They can invalidate your insurance as some companies will not insure a car with a decat iirc but I have no idea on the legality. If you were pulled over and had your emissions tested roadside i guess you'd get a fine and a producer to get it tested.
 
  Scirocco GT 210
As said they won't pass a MOT.

Also, if you're unlucky enough to pulled and tested on the roadside then you'll be caught without a cat (illegal) and given a £1k fine. You'll have to be very unlucky for this to happen though.
 
  Audi TT 225
But the chance of getting your emissions tested are very very low! unless the coppa wants to try and "have" you for something and starts poking around your car...
 

Christopher

ClioSport Club Member
  Z4M
they are for "off-road and show use only" iirc

about 60% of 172/182 owners on here have them...must be a lot of show/track cars!

your car will not pass an MOT without a cat, just depends if you can find a friendly place to test...or you cna be arsed to swap the cat back over and buy a new fitting kit every time ideally
 
  C63 PP,R1,,Clubman
If i got pulled over and they wanted to do a test id let him do it and whilst hes down there id give him abit of decat in the face and drive off :cool:.
 
  VaVa
I'll find one. Amazing what a few notes and a couple of crates of lager can acheive. lol.

Will certainly be better than killing a Copper!!
 
R

rich[182]

Been thinking about getting a decat for a while but no-ones ever been able to post a link to a website that gives a definitive answer that cannot be disputed by anyone

I've decided that despite wanting one I simply can't be arsed with the hastle.........all this talk about insurance companies, police, MOT's, VOSA etc,etc and spending £30 to swap over ever MOT then £30 to put decat back on, all for a couple of bhp on a N/A engine

The cat on the 182 is quite good anyway, surely the wiser option would be matched inlets
 
  S2000
Just to clear it up having a decat IS NOT NECESSARILY ILLEGAL. Legally all cars post some point in 1992 iirc had to come with a cat from the factory, however cars DO NOT have to have a cat by law thereafter, it is only legally required that the manufacturer fits one. It does have to pass an emissions test but if it can manage to do this with a decat (that is unlikely tbh but I have seen it happen with a few Mk1's) then its perfectly legal.
 
I know the end result is the same, but surely it isn't actually the lack of a cat that's illegal? I thought it was the resultant emissions problem? In other words it's not illegal as long as your fumes are ok? I may be wrong, and I'm sure a decat makes them not ok anyway.

I don't think it matters much with the 182 anyway. I'm fairly sure the insides of mine are sprinkled up and down the M6 Toll :( Toytown exhaust system when all is said and done.

EDIT: cross posted.
 

ForceIndia

ClioSport Club Member
  Gentlemans spec 200
Can be used by insurance to void your policy, guy on pistonheads impreza was written off and he got zero payout
 
  Megane coupe 1.6 16v
You can remove a cat and pass an MOT, you dont have to have one just pass the emissions test. Which a good nick 2.0 16v should do tbh.

However it is illegal not to have a cat post 1992, construction and use regs, you can get pulled and fined. They could even crush your car lol

Best bet is just remove all the inners of your cat, its cheaper and it still looks as if you have one. Then if vosa pull you, chances are your going on your way without issues. If they still doubt you they will do a test, if you pass that i doubt they would carry on further investigations and take your cat apart.
 
  172 cup'd extreme
If stopped by Vosa and you fail emissions you get a notice to put it right and signed by an MOT station.
172 wont pass with a decat ever.
 
  Megane coupe 1.6 16v
Really!! thats bad.

Ive seen the F7R powered coupes pass by miles.

Mine passed, normal idle 0.00000, fast idle 3000% below the limit.
 
  Civic Si
its not illegal to have a decat, no where in the law does it state that your car must be fitted with a cat, the law just states that your car must pass an mot emmissions test.
 
  172 cup'd extreme
Really!! thats bad.

Ive seen the F7R powered coupes pass by miles.

Mine passed, normal idle 0.00000, fast idle 3000% below the limit.

I spend a whole afternoon with my mates gas analyser trying to get it to pass just for an experiment, failed misserably
 
  Megane coupe 1.6 16v
its not illegal to have a decat, no where in the law does it state that your car must be fitted with a cat, the law just states that your car must pass an mot emmissions test.

Wrong, it does. Construction and use regulations like i have said
 
  Megane coupe 1.6 16v
Really!! thats bad.

Ive seen the F7R powered coupes pass by miles.

Mine passed, normal idle 0.00000, fast idle 3000% below the limit.

I spend a whole afternoon with my mates gas analyser trying to get it to pass just for an experiment, failed misserably

Was this only one car? It was probably a sh!tter.

Seen much more juicy cars pass with decats tbh
 
R

rich[182]

#27 posts and still no link to any website categorically stating the facts is good enough for me to stand by "it aint worth the hastle", no disrespect to anyone but it just seems like everyones got their own opinion on the issue thats derived from hearsay, speculation, assumption and chinese whispers etc :S

If it's clearcut one way or the other, surely theres somewhere that can clear it up, end of ?
 

Jamie

ClioSport Club Member
As far as i was aware having a decat or not is irrelevant, its if you can pass an mot without one based on your emmisions. Its the law is on emissions not on the adaptations to get it through.
 
  Clio 182
my 182's emissions light has gone off since i changed my plugs, and thats a decat - no idea if that relates to the actual law on the emissions though? As far as I'm aware, you can have a decat aslong as it passes - although thinking about it, the car would have much higher emissions than standard, which is how cars are taxed, so maybe not.. when all's said and done though, they aren't going to take a car away to find out - a notice is all you'd ever get
 
rich[182];2806192 said:
#27 posts and still no link to any website categorically stating the facts is good enough for me to stand by "it aint worth the hastle", no disrespect to anyone but it just seems like everyones got their own opinion on the issue thats derived from hearsay, speculation, assumption and chinese whispers etc :S

If it's clearcut one way or the other, surely theres somewhere that can clear it up, end of ?


When I fitted my de-cat I wanted a definitive answer and I found it on the UK MOT website.
 
  Megane coupe 1.6 16v
Yes problem is MOT and construction and use are different things.

Its fine not to have a CAT for the MOT as long as you pass the emissions.
 
  S2000
As far as i was aware having a decat or not is irrelevant, its if you can pass an mot without one based on your emmisions. Its the law is on emissions not on the adaptations to get it through.

100% correct. By law car manufacturers have to fit them from the factory but as soon as it has left the factory it doesn't matter if it has it or not as long as it passes an emissions test. It does seem kind of stupid but thats the way it is.

Really the best bet is to have a nice J-Reg Clio that doesn't need to meet the lower emissions ;)
 
  172 Cup
mine p reg, but thanks for your help i recently brought one from ktec and am wondering wether to send it back of just feck it and put it on.

thanks for all help
 
  T Reg clio 1.4
probably not relevent but i drive a 2.0 16v megane coupe and last year it passed emissions with a decat pipe and this year struggled to pass with a cat
 
  RenaultSport clio 172 mk2
If you're that bothered to find which ammendment to the Road Vehicles Act is was then click on opsi.gov.uk

Very heavy going you could look through amendments for days.

Found something strange I never knew though;

From the Road Traffic Act 1991:

20.—(1) Section 144 of the [1988 c. 52.] Road Traffic Act 1988 shall be amended as follows.

(2) In subsection (1) (which removes the requirement for third-party insurance or security where £15,000 is kept deposited with the Accountant General of the Supreme Court) for "£15,000" there shall be substituted "£500,000".


You don't need to have third party insurance if you deposit half a million! But up till 1991 that was only £15K!

Never heard of that before, 15K and you were OK to drive any car you owned. Half a mill's a fair bit off the lottery jackpot dream garage though.

Nothing specific about cats yet.
 
  E92 M3,172 track car
Really!! thats bad.

Ive seen the F7R powered coupes pass by miles.

Mine passed, normal idle 0.00000, fast idle 3000% below the limit.

I spend a whole afternoon with my mates gas analyser trying to get it to pass just for an experiment, failed misserably
My 172 only just passed with a 200 cell sports cat' and that was after 20 minutes of trying. My car is by no means a shitter.
 


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