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Date: Tue, 13 Nov 2001 18:45:41 -0600
From: "Walt Kienzle" <wkienzlenopsam.com>
Subject: Re: UK Fuel Grade


As part of this thread, several people have mentioned that removing the catalyst will cause a car to fail the MOT. Here in the US, we don't have such a nationwide inspection, but instead people (and their cars) from various specific regions are discriminated against by having to go through an emissions inspection. Part of this inspection includes checking for the presence of the catalytic converter. This is just a visual inspection. The testing station has a mirror on rollers that they roll under the car to view where the catalyst should be. A friend got around this problem by removing the "guts" of the catalyst housing by punching it out with a hammer and chisel and then reinstalling the empty shell. I was wondering, would the MOT inspectors detect if someone had done this type of thing? Walt Kienzle "David Haydon" <home01nopsamorld.com> wrote in message news:PAfI7.24163$0W1.4027882nopsam2-win.server.ntlworld.com... > in the UK '91 and before you can remove the CAT and still pass the MOT. > After that you _should_ not pass without a CAT. The Abbot CAT replacement > pipe is very expensive, a straight pipe is cheap and any exhaust shop should > be able to fit one, but this will change the exhaust note. There is a mid > box version on some non-CAT '91 cars, but I think the front pipe is also > slightly changed - this would be a realtivly cheap alternative with no > 'note' change (from memory I think eurocarparts do one for around the 30 > quid mark). > David > > "chrisnew" <chrisnewnopsamorld.com> wrote in message > news:SoiH7.4834$is2.847335nopsam6-win.server.ntlworld.com... > > Under "normal" use, there is no increase in noise. With your foot on the > > floor there is slightly sporty note to the exhaust, but still quite > > acceptable. On the motorway you won't notice the difference. My cat was > > replaced with a single SAAB exhaust, as the straight pipe alternative is, > I > > believe, noisier. > > Chris > > SimonJ <menopsam.com> wrote in message > > news:9sh6rt$kps$1nopsamunium.btinternet.com... > > > > > > "Walt Kienzle" <wkienzlenopsam.com> wrote in message > > > news:3beb49ce$0$43573$272ea4a1nopsam.execpc.com... > > > > Also remember that the cat acts somewhat as a muffler. Removing it > will > > > > make your exhaust sound louder. I don't know how much louder on a > Saab, > > > but > > > > on some American V8's it is nearly obnoxious. A friend's 5.0L Mustang > > > comes > > > > to mind. > > > > > > > From what i have been told, the noise increase is not excesive on a > 9000. > > > > > > If your car is post 1993, you will need the cat fitted to reach the > level > > of > > > emisions for the MOT test, in this case it would be wise to keep your > cat > > > intact, and buy a cat replacement pipe, so you coud refit the cat when > > > taking the car for test (and of course you would have to leave it fitted > > > when driving on a public road, saving the cat replacement pipe for > 'track > > > days') ;-) > > > > > > > > > > > >

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