10-Gauge black anodized billet aluminum outer cover. Black backing plate. Comes with an exposed performance synthetic black air cleaner element for good looks and excellent performance. Note: This synthetic black air filter element requires no oil. To service just clean and rinse. Do not use oil. 16-17 Softail 2017 FXDLS 08-16 Touring Trike (NU). (e-throttle)