im not sure how clean the CR engines run, i dare say alot cleaner than the PD but when i had my dpf removed even with stage 0 still produced a bit of soot, i think because the engine is producing 170PS then the by product is soot, dependent on the colour of car you have it might be something to think about as with the DPF removed all the soot that would be normally filtered out usually ends up on your rear bumper. to the point where i couldnt live with it. but if you have a black car or your not too particular then go for it but just for a slight increase in noise i would say its a big expense and pain in the back side
there are alot of people on here really interested in modifying and forgive me for sounding like an old man at this point but i personally think the FR is a cracking car in standard guise. i spent a lot of money trying to turn it into something its not and in the end returned it to standard.
thats my 2 pence worth anyways