Yep - 3-way system with 6.5"s, 2.5" and tweeters. Crossovers hidden wherever they can find room.
These guys are good, and know what they are doing, I have had them do previous vehicles. They have a lot of BMW experience. Nothing could possibly be worse than the mush that comes from the stock bass units LOL.
They don't just install, they listen to it - if it's not 'working' they'll know. I'll ask them about the porting and possibility of / need for lining when they do it.