Wunderlich - Oil Cooler Protection Grille Extreme for BMW R nineT RacerFinely meshed stainless steel grille with a sturdy anodized aluminum frame construction to protect the oil cooler. The oil cooler lies in an extremely vulnerable position. Any stones sent flying into the air by the front wheel can come into immediate contact with the delicate cooler fins. On our first test bike, there was significant damage visible even during the breaking in period. A visual highlight: Covering the black radiators with our grills