I need your advise on performance mods for '07 X5 4.8

[NX-1 Auto Detailing]

Hello guys!
First let me introduce myself...
My name is Mario, I'm from northern NJ and I'm here to learn as much as I can about the X5 and other bimmers.
I own a Jeep SRT but I'm definitely not here for that, I'm trying to help a friend of mine that owns an X5 4.8, I just finished doing some work on his X5, like detailing it, swapping fender flares to the sport model ones for better appearance with his 21" tires and other things.
But my question to you guys is about performance mods for this power plant.
What's available to wake up this motor a bit more?
What are my tuning options? Is there a hand held programmer or chip I can use?
What are the most common bolt-ons for this motor, like CAI, exhaust etc?

Thanks in advance and glad to be here, it seems like a nice community and the pics I've seen of your rides look great.

Talking about pics, here are a few of my friend's X5...