Is the DPF the cat aswell?

[lee gsi]

I am looking at doing away with my rear box when I do a twin exit on my Signum CDTi.

Apart from the pre cat is the dpf also a cat too or is there another box under the car (I cant remember)?

I want to do away with some box's and the DPF but dont want it with no box's so its too loud.

[mally]

On the estate, the DPF is combined with the cat, so I would think the Signum is the same.

[lee gsi]

So best not remove the front cat then if I dont want so much diesel smell and noise.

[mally]

Keep them both if you don't want extra smell and noise.

[Critch]

Bin them all an get it mapped.

Dpf pain in arse anyway lol

[simmo3187]

Bin them all an get it mapped.

Dpf pain in arse anyway lol

[C-Owner]

On the estate, the DPF is combined with the cat, so I would think the Signum is the same.

Who told you that ?

[lee gsi]

Is it not true then?

I dont want loads of noise and as I am loosing the rear box I need to decide what parts to keep of the exhaust.

I will be getting the DPF mapped out but if its dpf and cat in one I will need to keep the precat.

[mally]

Who told you that ?

Well, I trusted the word of the garage that took my DPF off.
Oh, and the device that sits between the turbo and DPF happens to be called the PRE-cat.

[C-Owner]

Technically speaking its an oxidization catalytic converter.