Upgrade the sound system of your BMW E46 Compact with this custom-designed Adapter for 165mm front speakers. The E46 Compact features larger front door speakers compared to other E46 models, and this adapter is specifically designed for a plug-and-play installation, allowing you to fit 165mm aftermarket speakers into your car?s original speaker housing. Compatibility Note: This adapter is specifically designed for the E46 Compact and may not directly fit other E46 models (such as sedan, coupe, or wagon) due to differences in speaker sizes and mounting configurations. If you own a different E46 model, adjustments or modifications to the adapter may be necessary. Key Features: Custom fit for BMW E46 Compact: This adapter is designed specifically for the E46 Compact, which has larger front speakers than other E46 models. Fitting for 165mm speakers: This adapter allows you to replace the factory speakers with 165mm aftermarket options for better sound quality. Easy installation: The adapter screws directly into place without needing any additional screws. Just replace the original speaker with the new one using connector wires and some glue. Sound quality upgrade: Use the adapter to install high-quality speakers like the Audio System MS 165 EVO for a significant improvement over the factory sound. Vibration and noise reduction: Recommend gluing the speaker to the adapter ring with bitumen and using foam around the edges for enhanced noise and vibration cancellation. Assembly Instructions: The adapter screws into the door in place of the original speaker. Glue the speaker into the adapter ring and ensure the wiring is threaded through before securing the speaker. Optional: For additional noise reduction, use bitumen and foam. Speakers Used: Audio System MS 165 EVO (165mm diameter, 63mm depth, 80W RMS, 2-way TMT, compatible with a radio without an amplifier).