How Many Catalytic Converters does the Impreza Turbo have, 1 Or 2.
And where are they, I think there's one in the Downpipe and one in the Center pipe is that correct.

Whats the law regarding Cat removal, can you get away with removing just 1 of them.

Cheers....

 

It depends.

UK or Import?

Classic or bug-eye?

 

UK - MY94

 

Uk (pre bug-eye) had two cats (at least my car, MY98 did).

One in the downpipe and one in the centre section.

Jap cars of the same era had 1 or 2 (I think)
They all have one in the downpipe. The centre section may contain a cat or not. I'm sure more knowledgeable people will help.

The new model I think has 3 cats.

 

Unfortunately, only 1 cat.

 

Hyperex,

Can you confirm that an MY94 UK only has 1 Cat i.e in the Downpipe.

Hence if a Scoobysport Downpipe is fitted I'm Catless hence will fail an MOT.

 

My STI Type R have only 1 cat at the front pipe, where middle section was silencer.

 

Scott,

I cannot confirm the UK model whether there is 1 or 2 cat as i don't live there. However, without doubt i will remove the cat at the front pipe, if uk model have 2 cat, i will remove them all.

To pass the mot? We have similar emission test here. Tell you what i did, i didn't put back the cat at the front pipe (big job) but i was using a more restricted cat (than standard) from other car's exhaust bought from junk yard, cut and wield onto the existing mid section i have for passing the so call mot when necessary.

 

<BLOCKQUOTE><font size="1" face="Verdana, Arial">quote:<HR>Originally posted by Hyperex:
<B>Scott,

Unfortutely, only 1 cat

[/quote]
then
<B>

I cannot confirm the UK model whether there is 1 or 2 cat as i don't live there.

</B>

??????



[This message has been edited by Pete Croney (edited 02 August 2001).]

 

I believe the Classic UK Turbo (including EU imports) has two cats.
One in the downpipe and one in the centre section, The one in the centre section is a cold cat for when the car has just been started and the other one in the downpipe is for when the engine is at running temprature.
Hence most people remove the centre cat and can still pass the MOT as long as the engine is at running temprature.
I think this is for the later turbo's (post MY97), I'm not sure about the earlier ones ? sorry.

The New Age Turbo's, sorry WRX's have three cats !!!

 

Not sure about the law but I think it goes something like this "If the car is fitted with a cat from manufacture then it needs one to pass the MOT and may need it to be classed as road worthy (only a problem if the old bill are hot on it)"

Don't quote me on this.

 

Does this mean that you cannot fit a performance downpipe and then refit the 2nd CAT (centre section) for the MOT?

Russell

[This message has been edited by WUZ (edited 03 August 2001).]

 

I've recently been through this when I removed the cat from my Elise.

As far as I am aware, UK law does not require you, to have a cat fitted to your car. Only that the car passes the emissions test for the MOT.

New cars sold in the UK, post-93 (I think), are required to have a 3-way cat fitted by law.

You may find that it is impossible to get a car past the MOT emission test without a cat fitted.

The police can check your emissions at the side of the road, if you fail this test you're likely to be fined.

I'm no solicitor so don't quote me on this in court


[This message has been edited by ScoobieNewbie (edited 03 August 2001).]

 

My understanding is that a UK model has 2 CATs one in the D/P other in the centre. The D/P CAT is the big one which works from cold (or heats up quickly enough to pass tests), the centre CAT is a little one.

If you remove the centre CAT only the car should still pass an MOT. If you remove the D/P one only then the car probably won't pass an MOT when the engine/CAT is cold, and will struggle to pass when warm.

I've heard of people removing both CATs then making up a custom centre (with 2 CATs) to throw on at MOT time.

Stuart

 

I believe that the PPP involves replacing the centre section with a cat-less straight through pipe, leaving just the one in the downpipe. I don't know of PPP owners having particular problems come MOT time (at least, I hope it's OK!) - so removing that one should be OK. I'd also be surprised (and annoyed) if UK Subaru dealers were selling official upgrades that render the car illegal.

Andy.