@Epoc : I had the decat done at PowerFlow in Bellville Cape Town. The decat was R600 and the extra middle box to block out the scratch noise was R700. I only decatted the two cats under the "driver seat" if u can call them that. I know the m3 has four cats but i don't know about my 328i. Just had those two removed.
@moranor : The branches and full freeflow can only improve fuel consumption cause air flows more freely. The more "blockage" the harder it is for the air to flow in or out and the more fuel is used. The noise factor will probably depend on what brand of freeflow u install. PowerFlow advised me against even putting a back box in because they say the drone will kill me after a week, thats why i only did the middle box and decats. But i have heard that people like noise boys and TNT, which StreetRacer will advise u on, actually have nice, not too loud, sporty sounds.
did you have any problems with the management when you did your decat? im thinking of doing it myself but ive read stories about O2 readers and things no one seems sure...
