You have the option of your original airbox before or after production to send in. If you send in your AirBox you will receive a refund of 280 €.
The Carboproject Carbon Airbox can be used plug & play in the M3 V8, simply mount and drive. There is no change to the engine management. Therefore, no test bench adjustment is required. By increasing the air flow and the full carbon upper part, the BOX generates a classic motorsport sound and increases the fresh air flow.