i have a Bluetooth box next to the factory amp, which means there's no extra room for the amp.
I guess i just give up to stealth the amp.....

Thanks anyway.

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2008 X5 4.8i Black Sapphire/Black perforated int./Dark Bamboo wood trim, [w/ all factory options except rear DVD system]
+ aerodynamic kit/stainless pedals/illuminated door strip/3M Color-Stable tint/LED license plate light/Thule's 91726 snowboard carrier.
2006 X5 4.4i, Titanium Silver/Black int./Anthricite Maple(traded)