PVC Pipeworks 1-1/4-in 45-Degree PVC Elbow in White (4-pack) in the PVC Pipe & Fittings department at Lowes.com
Amazon.com: AC PERFORMANCE OD 4" (102mm), 45 Degree Bend Elbow 4 Inch 6061 Aluminum Pipe Tube Intercooler Pipe High Class Brushed Treatment Tight Radius Air Intake Tube : Industrial & Scientific