4 channel Sound System individual ground harness adapter set radio NOTE: Please specify which version

NOTE:  Please specify which version you need for your car

Power/ground and memory/illumination connectors are polarized for safety and ease of installation like the OE plugs

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

E36 or Aftermarket radio

NOTE: Also works for 4 channel radio installs in cars built ONLY up to mid-89

4 channel Sound System individual ground harness adapter set radio NOTE: Please specify which versionThis 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