Cat Bypass Pipes

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I have been told that the standard catalytic convertor is prone to breaking up which can subsequently cause an expensive engine failure.

I've had a scan around the forum and can see no stories relating to this. Can anyone confirm please?

Also, if you do replace, what happens come the MOT? Do you have to get the spanners out and swap back?

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Anyone????

70Proof, you seem to be the Lambo guy on here. Do you know?

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70proof said:

http://www.pistonheads.com/classifieds/parts-and-p...

But then is it a hard sell?

Thanks for the replies guys.

Yes, this is exactly what I was talking about, and funnily enough who I heard about the problem from!!!!!

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dang2407 said:

pre-LP and LP cars are different. The pre-LPs have the cats after the headers and are hence easier to replace. The LP cars have the headers as part of the headers and thus require an engine-out job to replace (if you can replace just the cats....).

Hi Dang

This is a pre LP car I'm asking about.

The question is not wether it's possible to change but one of, is it necessary. I was told that the cat is prone to breaking up, causing catastrophic engine damage! I think 70proof confirmed my thoughts.

On a separate note, does anyone know how to improve the 'jerky' getaway when cold. E-gear car.

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Thanks guys.

I already have the car. I will speak to the garage when it goes for next service. Just need to decide who that might be now!

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Just wanted to update this thread - thanks for all the replies. Especially 70proof for the recommendation of Backdraft Motorsport. Excellent service from them and Mark totally allayed any concerns that I had.