E46 325i Decat

[Bandile]

it all depends on the configuration of your exhaust system

1) If you have CATS that are co-located on the manifold with sensors integral to the CATS, then you can either a) remove the manifold, then "hollow out" the CAT, ie remove the internal platinum stuff, and then replace it, it will still look exactly the same.....I think we would charge about R600 per CAT to hollow out the internal stuff, mainly a labour job with new manifold gaskets and some welding....or you could change the entire manifold for a set of branches from VIPER or utilize a set of E36 328i headers, as these have fittings for the sensors..........in both cases no re-mapping is necessary

2) If you have CATS situated under the car, about mid distance, then these are generally not fitted with any sensors, so a straight forward cut and replace with a straight piece of exhaust pipe....about R150 per CAT/Pipe or you could substitute the CATS with a freeflow box, for another R350-R400 or so

In all cases the sound will not change by very much, as most of your cars "REAL" sound changes and silencing is derived by the rear box

Ralf, you have PM sir.

 

[Ralf*]

Ralf, you have PM sir.
[/quote]

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:coolShake:

 

[clive7]

Hi to you all good people.

Thank you for this very useful info. In the picture below is the exhaust of my e46 325Ci, and I would love to have this mod done to it. Just a few questions to assist in doing this;

1) Given this arrangement here , will it only require taking out the CATs, then replacing them with the pipes, and its good to go? (that's how I'm understanding it with reference to some comments here, and to what I see on the exhaust).

2) Is this a sort of job that I can do by myself, (I can do electric-arc welding pretty well) or specialized welding, e.g. TIG, mig etc shall be required?

3) What sort of pipes to use, same diameter pieces off old exhaust pipes, otherwise are there any specifics to follow?

4) I will also be very glad to be enlightened on these "resonators", what their purpose and advantages are over using simple pipes?

Thanks again!