WOOLF AIRCRAFT PRODUCTS Mild Steel Bent Elbow 4.500 90-Degree, by WOOLF AIRCRAFT PRODUCTS, Man. Part # 450-065-450-090-1010 Exhaust Bend - 90 Degree - 4.5 in Diameter - 4.5 in Radius - 16 Gauge - Steel - Natural - Each $50.99 add to cart Quick view Add Wish List