Have had a quick look round about de cating my lupo sport and have heard something about a cat and pre cat? One being under the car the other being in the manifold, can someone please clear things up as I would like to de cat it but if it's in the manifold I don't have £££'s to get a de cat manifold or if it's under the car then is it possible to get a de cat section made? Any help would be great, thanks!