I had an iPX and it was connecting fine for me. I'll try tonight with my iP12 and see if it still works. I gave up with BT audio since it sounded so eh.
You would definitely want HFC to go with the rest of your breather mods. Headers - I would not bother unless you have cash to burn as the price for these are so expensive and it's not worth the coin for the gains (IMO).
Do you know if we need to keep the CD player stacker to keep the aircon/OEM screen to work? I was thinking of removing the analogue clock/CD player and volume controls bit + card reader would provide enough space for a 7"Alpine in there.
If you are running stock wheels, you will need to get the stock nuts. Aftermarket ones will not fit properly, unless that's changed since I last checked 2 years ago.
The part number you are looking for is 40224JK00A.
I have my stock suspensions and springs in storage. Can take em out if you want to buy them. Took the stock springs off the car at 38,000kms and suspensions at 105,000kms. Both look fine. I’m in WA.