I am offering up a custom Kenwood Subwoofer w/ enclosure and Kenwood Amplifier (KAC-8104D)

This was installed in an 1998 (E36) M3. You can buy either item separately or together. I will cut you a deal to take both off my hands.

Asking $175 for the subwoofer

Asking $75 for the amplifier

all prices OBO