Mate in my opinion go with a DIY cai
price wise its about $20 to get a mcai from holden
You do not need anything else as u can use ur standard lower airbox
v8 air box = alloytec air box
all you need is the front shroud which you need to trim at the bottom so as to clear the rad tank in front
you can see on the very edge of the photo the shroud sealing around the headlight under the guard
i did this trial fit first hand to see if it would fit before doing the two hole mod
hope this helps