Pre-cat. . . . . REMOVED!

[GrayMK5GTI]

@daz_pd: Mostly mixed driving but like boosting quite a bit, don't see much high revving.
Thanks for the link to that DP... my only concern is the emissions for MOT.

PDT: Cheers, that would be really helpful... The spikes of 900*C worry me a bit.

When I had my standard dp with the pre  cat delete it still sailed through the mot on emissions. Most people dont take the car for a blast and get the cat piping hot before mot's. The mot doesnt test cold start emissions so just get the cat warm and all will be fine.

Emissions have been discussed plenty earlier in in this thread, I can't believe folk are still bothered about failing an MOT when loads of us have got through ok. 

[ArildStavrum]

Apologies to bring up this old thread but i'm just off the phone to the indy specialist I use and he advised I would fail an MOT with the pre-cat delete - I have a milltek cat back - does that make a difference?

Normally he is spot on with everything and has a gti stage 3+ himself so this has really confused me!

[GTI-Ross]

Is he 100% sure you meant the PRE-cat, not justthe normal one. Pre-Cat is only for cold starts, not even checked in the UK.

Trust me you wont fail it.

[ArildStavrum]

Is he 100% sure you meant the PRE-cat, not justthe normal one. Pre-Cat is only for cold starts, not even checked in the UK.

Trust me you wont fail it.

You see this is where I got completely baffled as he said I dont have 2 Cats.....
As i said he is normally spot on but this has thrown me.

[GTI-Ross]

Is he 100% sure you meant the PRE-cat, not justthe normal one. Pre-Cat is only for cold starts, not even checked in the UK.

Trust me you wont fail it.

You see this is where I got completely baffled as he said I dont have 2 Cats.....
As i said he is normally spot on but this has thrown me.

Unless you have a custom Downpipe that has no Cat in it, then you defo have 2 cats cats (pre-cat and normal cat) the Pre-Cat is worthless and restrict airflow

Your guy does sound, but he defo wrong on this occasion mate

[ArildStavrum]

Is he 100% sure you meant the PRE-cat, not justthe normal one. Pre-Cat is only for cold starts, not even checked in the UK.

Trust me you wont fail it.

You see this is where I got completely baffled as he said I dont have 2 Cats.....
As i said he is normally spot on but this has thrown me.

Unless you have a custom Downpipe that has no Cat in it, then you defo have 2 cats cats (pre-cat and normal cat) the Pre-Cat is worthless and restrict airflow

Your guy does sound, but he defo wrong on this occasion mate

I dont have a custom downpipe - all I have is the Milltek Catback, the remaining exhaust is stock.
is the pre cat seperate to that which would have come with the milltek catback?

apologies if that is a retarded question!

[GTI-Ross]

No its built in to the down pipe, so if you have the standard Down Pipe then the pre-cat will be there. Just need knocking out 

[GrayMK5GTI]

Ross has it covered - All GTI's (Inc edition 30) have a pre-cat right off the turbo at the top of the downpipe.

It WON'T fail an MOT without it as it's not required for an MOT. if you are really worried, make sure the car is warm when taking it in for the MOT. none of us have had a problem 

[ArildStavrum]

So....just to be crystal clear.

There is a precat right of the turbo and there is another cat that is part of my milltek catback??

Again apologies if I'm being a muppet.

[woky]

Ross has it covered - All GTI's (Inc edition 30) have a pre-cat right off the turbo at the top of the downpipe.

It WON'T fail an MOT without it as it's not required for an MOT. if you are really worried, make sure the car is warm when taking it in for the MOT. none of us have had a problem 

Does removing this cause any warning lights to appear on the dash ?

[56OctyVRS]

Ross has it covered - All GTI's (Inc edition 30) have a pre-cat right off the turbo at the top of the downpipe.

It WON'T fail an MOT without it as it's not required for an MOT. if you are really worried, make sure the car is warm when taking it in for the MOT. none of us have had a problem 

Does removing this cause any warning lights to appear on the dash ?

None at all mate

[woky]

is it an easy job? i,m thinking about getting the car remapped in the spring. Is this worth doing before i get it mapped ? cheers.

[smee]

So....just to be crystal clear.

There is a precat right of the turbo and there is another cat that is part of my milltek catback??

Again apologies if I'm being a muppet.

No. Engine to turbo. From the turbo cones your exhaust. Literally on the down pipe right next to turbo is the pre cat. The pipe bends 90 dehree to go down tje back of the engine here there is a flexi pipe. This ot bends again to run under the car. There is the bracket which goes in to sub frame and then the main cat.  Out the other sode of the cat your miltek starts

[Moz]

is it an easy job? i,m thinking about getting the car remapped in the spring. Is this worth doing before i get it mapped ? cheers.

Yes it's an easy job. Just a few bolts to remove and then a hammer and a flat driver or chisel to do it.

Worthwhile doing, it doesn't add much BHP but does sound better and also if you're having a MAP it can be taking into account.

[GrayMK5GTI]

is it an easy job? i,m thinking about getting the car remapped in the spring. Is this worth doing before i get it mapped ? cheers.

All your questions are answered earlier in the thread