Carbon Fiber Plenum. Introducing our highly anticipated S85 Carbon Fiber Plenum – a masterpiece crafted from 100% premium prepreg carbon fiber, right down to the internal trumpets. This plenum serves as a seamless replacement for the OEM plastic variant. Designed with a singular purpose: to elevate the induction sound while preserving the performance and drivability that BMW intended. We’ve maintained the precise internal volume and trumpet lengths meticulously tuned by BMW engineers. By adhering to these specifications, we ensure there’s no compromise in power delivery, safeguarding your low-end torque. While the carbon plenum doesn’t provide a performance boost per se, it’s the symphony of induction sounds it orchestrates that truly transforms the driving experience of the E6X M5/M6. This plenum can be used with the OEM airboxes or most aftermarket intake system. *Some images shown with the optional Carbon Intake. M and V10 badges not included. *By request/order.