This MBRP exhaust is designed for BMW M3 and M4 owners who want to enhance their driving experience. Whether you're cruising on the highway or hitting the track, this exhaust will make your vehicle stand out. It's made of T304 stainless steel with carbon fiber tips, offering durability and a stylish look. The 3 - inch axle - back dual rear - exit design is engineered to fit 2021 - 2025 BMW M3 and M4 models, ensuring a perfect match for your car.