I am looking into buying a Janspeed de-cat at the moment for my K11 1.0i. However, I am wondering if the Janspeed manifold would be worth the extra outlay instead. I can't really afford both at the moment, and the de-cat looks a lot easier to fit, not to mention being a lot cheaper. So what sort of gains could I expect from a) the de-cat and b) the manifold? I am not expecting much but every little helps, and if the manifold will do a lot more for performance than the de-cat then I will probably get that. Also, how easy is it to fit the Janspeed manifold? Any advice much appreciated, as ever.