INViSiON can be your solution on the 4.8 with Sport seats. Please have a look at my website and you can view the different products that I offer. I recommend the Revolution 2 for your specific vehicle. As far as features, convenience, and warranty I think you will find the INViSiON headrests are the way to go. Not to mention I am providing free SECURITY COVERS to all xoutpost.com members that buy an X5 or X3 system. I have all BMW interior colors available and ready for immediate shipping. If you ask around on this forum you will find many satisfied INViSiON customers. Pleasse contact me and I will allign you with a channel to purchase my products in your immediate area. Thanks for your interest and I look forward to speaking with you.

-Lawrence

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Lawrence Siegel
(407) 494-5LAW gv
Skype: AceDeucy
Gracie Barra Orlando Academy of Brazilian Jiu Jitsu