Congrats man, take some pics!
1. Make sure it's not the alternator. The ones for the V8 crap out quicker than the 6.
2. dunno
3. The speakers do suck.
4. Isn't the 4.8is exhaust louder?
5. Nice
6. You sure you want to lower the X5?

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95 M3
03 X5 3.0
06 X3 3.0 Sport