Genuine BMW Exhaust Muffler - 18307567172 - This genuine BMW exhaust muffler is designed to provide superior sound quality and performance for your BMW vehicle. It is constructed from high-quality materials and engineered to meet or exceed OEM specifications. This muffler is a direct fit replacement for the original part and comes with all necessary mounting hardware. It will provide a noticeable increase in power and sound without compromising on fuel economy.