excuse the noobish question here, but with only a TBE, drop in filter will i need to get bigger injectors/fuel pump when I get my tune? i read the stock fuel parts on the IX are good for up to 400 hp but also have heard from some tuners that they've had to 'detune ' the car in the end a bit since the car's fuel system was still stock.

 

Find another tuner then. You don't need either.

 

The stock injectors should be fine for anything that the stock turbo can dish out. The IX´s pump although slightly better than the VIII´s pump will have to be replaced after the basic round of mods.

 

not necessary with those mods