Just had a look and it's a ba to bf it says on the snorkel should be rite with that one with a new air filter? ?

I am guessing you mean the inlet for the Air Cleaner? All standard AU/BA/BF use the same, if it had a pair of Tickford wings on it, you would have one that has a larger CFM.
Standard

Larger CFM

Buetifull thanks heaps for the reply I will make sure I get the rite one heard big mouth in the standard au box gives extra 2, 3 kw not much but I can see my engine wants that bit more air then I reakon should launch xr6 vct was holden but stuff that after got the xr6 au big power difference