Hello, I just got an 08 X3.. The SUV is great but it needs XM and HD to be "perfect".. Now I have a BSW Kit (the one that uses a Blitzsafe) from a friend who got rid of their 07 Z4.. Both of these cars have the same radio and nither have Navigation. SOOO how do I add HD radio to the mix? The 08's are prewired for HD right? so I just need the part number.. Can I run XM and HD? I know XM replaces Sirius so does HD run seporate?

Thanks for the feedback.
Josh