4 channel Sound System individual ground harness adapter set radio Rear channel adapter: works with

Rear channel adapter: works with the Amp+ bypass adapter to connect your rear speakers

If you're making the wise choice to return to a factory BMW radio in your E21

so please allow 1-3 weeks for delivery

Trunk amp bypass adapter: plugs into your Sound System trunk amp harness connector

Please contact us at support@oemhifi

4 channel Sound System individual ground harness adapter set radio Rear channel adapter: works withThis is a complete, no cut wiring kit for customers with premium Sound System cars want to by pass their car's common radio output ground wiring. It includes the following components Ground adapter: plugs into your Sound System trunk amp harness connector. NOTE: you will need to remove your OEM trunk amplifier. Rear channel adapter: works with the Amp+ bypass adapter to connect your rear speakers Front channel speaker harnesses: connects your OEM