We are still working on the X5 package and getting each fitment set in stone. It is a 'pre-order' at this point for the E70.

With that said none of our Stage 1 packages replace undeseat subwoofers or include replacements for the subwoofers. There are 2 reasons for this. The first is the underseat 'subs' are nothing more than high excursion midbass drivers. Replacing this with a dedicated subwoofer will hurt the system and remove a lot of the factory midbass. The other largest speaker is a 4" driver in the doors.

The 2nd reason is many customers simply do not want any additional bass added to the vehicle. We always keep subwoofer upgrades separate for this reason.

Let me know if you have ANY other questions!

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2009 E70 X5 - Third Row - Rear DVD
Past - 04 4.4i Sport Package