Is it just a case of getting the nozzles and fitting them? or do you need a remap at the same time? can/will the engine run properly with the uprated nozzles on its standard map/ecu. did you notice a difference in fuel consumption?
im borrowing a friends 2000golf130gttdi and the difference in torque is quite a lot, he is totally standard with almost identical milage. could that be the 6 speed box that im noticing im changing gear more often?