The bosio nossles are alot better than the bosch ones aren't they? How much difference do the cams make to power output? Does it make power higher up the rev range or increase the volumetric flow capacity of the engine at increased rpms. It's all money isn't it?
Bosio are just different from bosch, they're a different design with maybe a better flow. I don't think bosch are to bothered about designing new nozzles for the older tdi engine as it's not so much in their interest with all the newer cars on the go. I totally like my bosio's anyway but be warned there are both fake bosch and bosio nozzles out there and they're both crap.