HGK Racing - E92 Rear Window Replacement/Radiator Air-Duct [Carbon Fiber]Rear window radiator air duct provides optimum airflow through the split rear screen drops away at both sides, diverting air through the rear of the car. Estimate weight 3,50kg; All parts are for TRACK AND RACE CARS only (not exhibition), adjustments will be required at fitting. Please note that there may be occasional small imperfections, such as small cracks, scratches and or slight size variations, which in no way affect their high performance