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Discussion Starter #1
I have a de cat on my car and i am needing to put a cat on it for an MOT (UK)

My question is do i just use a cat from a EK4/Si ?
Will that fit in place of the de cat pipe ?

Cheers for any help !
 

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Discussion Starter #2
just to add i know it not really engine building but wasnt sure where else to post it
Mods please feel free to move this
 

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Discussion Starter #4
my car is an EK3 (uk model)
The cat is built inot the manifold so that is not an option

I thought all d series cats were built inot the manifold ?
 

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Discussion Starter #6
The catilic convertor is built into the manifold
So to put one one i would need the full exhuast system

But i just want a cat for the mot

What cats are the same size as a de cat pipe ?
All them ??
 

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Discussion Starter #8
its ok i got the answer from another forum

If you didnt understand then you should ask and i would explain

An MOT is a test that is done on every car (if older than 3 years) in the UK to prove that it is in a road worthy condition, one of the things they test is emissions
This is where the CAT comes in
A CAT is a catlyic convertor which cleans exhuast gases as they go through the exhuast which results in less emissions
I have a de-cat which means the cat has been removed and a straight piece of pipe has been put in its place

And yes i could measure it my self as you say
But how the fuck do i compare it against some things else if i dont have one to measure


I thought you guys had CAT's in the states as well ?
 

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just buy a cat for an ek and it will most likely be one thats right after the manifold and just cut out your stock piping and put the cat right there. and take it out after the test. that would be my cheap way of doing it
 
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