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If it says on the MOT screen taht it should have a cat fitted and it doesn't then it'll fail. Best find yourself a friendly local garage and have it checked. You might get it close in terms of emissions and that might be enough.
Best thing is to put it in and play dumb and see what happens...
Cheers'en, AndyC
1994 ABY Coupe - Projekt Alpinweiss
Even if you don't have to have CATs (which you don't) it won't pass emissions levels without them. BTDT.
You WILL have to fit CATs to pass the MOT test. (Unless the MOT tester is dodgy)
Cheers,
Steve.
The Perfectionist
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Audi Class Concours winner Stoner Park 2014, ADI Concours D'Elegance Class Winner 2008, Runner up 2014. Winner, S2Forum Show'n'Shine Billing 2006 & 2008.
In need of an MOT for the UrS6. No cats, homefry, running fine, do you reckon it will pass?
Do they do a physical check for cats or just emissions?
Anyone with an UrS6 and a similar setup pass or fail the MOT?
I do not understand why people remove their cats. In good nick, they do not decrease horsepower.
We drive big heavy gas gulping turbo cars. The least we can do is keep the cats to minimize the emissions we create. Seems morally wrong to remove them (to me).
Where I live, the first thing they do for "Air Care" is to do a physically check for the cats. Then they run the car on the four wheel rolling road (driving a specified "road") and checking for emissions. My RS2'd UrS4 (288 whp on another four wheel dyno) passes the emission standards extremely well.
Did I mention that I still have my OE 200K km cats?
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
The test is not that the cat is actually on the car, but the emissions from the car.
The cat is simply there to help reduce them to the required levels.
They may not DECREASE power, but removing them can certainly help INCREASE it!
I do not understand why people remove their cats. In good nick, they do not decrease horsepower.
We drive big heavy gas gulping turbo cars. The least we can do is keep the cats to minimize the emissions we create. Seems morally wrong to remove them (to me).
Where I live, the first thing they do for "Air Care" is to do a physically check for the cats. Then they run the car on the four wheel rolling road (driving a specified "road") and checking for emissions. My RS2'd UrS4 (288 whp on another four wheel dyno) passes the emission standards extremely well.
Did I mention that I still have my OE 200K km cats?
Not So! My **** can feel the difference when my CATS are removed. They are definitely restrictive.
As for morally, well I only do 4000 miles per year, so couldn't really give a stuff I let out a little more harmful gases...
Cheers,
Steve.
The Perfectionist
sigpic
Audi Class Concours winner Stoner Park 2014, ADI Concours D'Elegance Class Winner 2008, Runner up 2014. Winner, S2Forum Show'n'Shine Billing 2006 & 2008.
Hmmm, so if I removed mine I would see a good benefit?
I have been thinking about it, especially as Im concerned their smell is poluting the worlds atmosphere after a good hard run
they are restrictive and there are perormance cats now which are much less dense to allow for more efficient flow AND emissions control.
As for cats being required depends which test, Basic Emissions Test is an easier pass than the normal version, depends on age of car as to which you will be required to complete.
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In good nick, they do not decrease horsepower. 
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