E46 M3 Underpanel Kit
This piece is fully CAD designed with all pieces precision CNC laser cut and formed. It consists of a 1-piece .080" aluminum panel utilizing a unique bracket system which connects straight to the chassis. You can rest easy if you are missing or have damaged your OEM plastic fender liners as the underpanel does not require these pieces individually or in combination since it relies on other points of strength to remain fastened to the car. The hardware included in the kit is high quality stainless steel.
The underpanel improves underbody aerodynamics, cooling system airflow management, protects the engine bay components like the radiator, pulleys, and belts from dirt and debris, and extends backwards, terminating at the chassis' heavy steel reinforcement plate.