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Catalytic converter gut tutorials

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Does anyone know of any around 'preferably video'?

Would like it to look as standard ad possible.

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Why? If it's not there it'll fail on emissions so you may as well just fit a cat bypass pipe.

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Why? If it's not there it'll fail on emissions so you may as well just fit a cat bypass pipe.

News to me they test diesels for emissions...

Edited by Jay.

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If its a welded on unit, you need to cut the cat off, stick something like a long pry bar inside, smash all the guts out of it, then weld it back on.

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If you're talking about getting the welder out I think it'll be easier to cut the cat out, cut it open lengthwise (so basically cut it in half front to back), cut/dig out the contents and then weld it back together, refit and sleeve/weld the cut pipes over. I had a mate you tried bashing the internals out of a cat - wasn't exactly an easy job lmao.

It's also worth looking at what the cat contents are. Some cats contain precioud metals and can be sold, which would cover the cost of a straight-through decat pipe...?

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If you're talking about getting the welder out I think it'll be easier to cut the cat out, cut it open lengthwise (so basically cut it in half front to back), cut/dig out the contents and then weld it back together, refit and sleeve/weld the cut pipes over. I had a mate you tried bashing the internals out of a cat - wasn't exactly an easy job lmao.

It's also worth looking at what the cat contents are. Some cats contain precioud metals and can be sold, which would cover the cost of a straight-through decat pipe...?

I presume he's doing it so when it comes Mot time, the visual check will allow it to pass.

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Kinda Jay. Its what I was advised to do instead of getting a straight through down pipe

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If you are planning on decatting a diesel e46 they have two cats, a bought decat pipe will just remove the main restrictive first cat so shouldnt fail an MOT. Ecotune will sell you one for £130ish and buy back your old cat for £80 if its genuine BMW.

Otherwise I would take it off, cut it along the top, pull the inside out, straight pip through and weld back over.

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