Vauxhall Astra G MK4 Alpine 800 Watts Front Door & Rear Door Car Speaker KitVauxhall Astra G MK4 Alpine 800 Watts Max Power Front Door & Rear Door Car Speaker Kit We have put together a complete Alpine speaker upgrade kit for car listed in the title so you dont have to shop around and worry whether it will fit or not. Kit includes the fixing brackets to mount the speakers and also speaker connectors so you do not have to cut any wires. Only thing you might need to purchase is some screws if the factory ones are not useable