looking at taking the cat out on my fabia vrs,does anyone no what bore pipe il need ?

just get a magnex de-cat pipe £70 and direct replacement

2.25

i think don't quote me

but if its an actual cat, try some whiskers cat food and place it outside the car, it will probably come out no problem

but if its an actual cat, try some whiskers cat food and place it outside the car, it will probably come out no problem

I'm with you on the 2.25'' vote, I believe that's what my original system was before I swapped to 2.5'' stainless, and mine was the same as the vRS system bar the tailpiece. This was a while ago though so I'd double check that.

Will the removal of the CAT effect the MOT emissions test and return a fail ???

Rang Skoda Parts Dept at Falmouth Cornwall and asked is a catalytic converter fitted on the front exhaust pipe to my 2005 Fabia VRS.

The fella quickly replied it has, and would be in the region of £450 - £525 to be replaced, and would guarantee an MOT emissions failure, if none were fitted.

Excess smoke would also come into the MOT for yet any type of failure.

So who can I believe what is the correct version, my fellow members, or the above fella. ??

I'm gonna have a word with the MOT tester and get what's what from the horses mouth so-to-speak about my exhaust set-up.

Edited 19 February, 201115 yr by giandougl

It shouldn't do..

Mainly as long as the car is running well etc, there is no reason why removing the cat would cause it to fail an mot.

Also, it isn't the same test carried out with a petrol engined car.. So there is much less chance of a fail, unless there is an underlying fault with the vehicle.

Will the removal of the CAT effect the MOT emissions test and return a fail ???

Diesels are not tested for emissions at MOT, only for 'excess smoke'.

There is no law, in the design or use regulations, or anywhere else stating a diesel must have a cat

its not even a cat anyway its a particulate filter...

not needed...

its not even a cat anyway its a particulate filter...

Really?

I just learnt something new!

The MOT is changing next year. I'm not sure if this will include cats for diesels.

BTW. it is NOT a DPF. it IS a Catalytic Converter. it's a Diesel Cat. Wikipedia - Diesel Cat There are no sensors, no warning lights. Also the 505.01 oil that is recommended for the Furby is not recommended for cars with DPFs.

All cars with DPFs still have Cats.

Edited 16 February, 201115 yr by Jim H

Really?

I just learnt something new!

its a cat on a petrol particulate filter on a diseasal...

There is no law, in the design or use regulations, or anywhere else stating a diesel must have a cat

I`m pretty sure no car has to have a "cat". However, petrols are tested for emissions, as long as your car passes that test, it doesnt matter if it has a cat or not.

Matt

I`m pretty sure no car has to have a "cat". However, petrols are tested for emissions, as long as your car passes that test, it doesnt matter if it has a cat or not. Matt

http://www.ace.mmu.ac.uk/eae/air_quality/older/Catalytic_Converters.html

Does anyone know if I already have a Magnex Decat pipe fitted and then decide to remove the backbox will I discover a drop of performance because of the lack of back pressure?

Been wondering this for a while now.

Thanks

No, the back pressure thing is a load of crap. Less is always better although it is helpful in a manifold to 'suck' air into the cylinders.

No, the back pressure thing is a load of crap. Less is always better although it is helpful in a manifold to 'suck' air into the cylinders.

Thanks for answering my question, I had a feeling it would be okay as I'm sure I've read a few posts on here with Fab VRS's that have this exact set-up. It must be pretty loud though on full chat? only one way to find out I guess :yes:

http://www.ace.mmu.ac.uk/eae/air_quality/older/Catalytic_Converters.html

It says all cars since 1993 have them fitted, doesnt say weather its law to have them, or just law to pass the emission tests. It`s irrelevant really, since very few cars would pass the test without one.

matt

Isn't the law, all new cars sold in the UK must be fitted with a cat. Hence why diesels have cats fitted when there not needed?