2 7/16" ID Mounting Flange. Filter Base: 3 3/4", Filter Top: 3", Filter Length: 4", Flange Angle: 20°.

• Increases engine power by offering minimum restriction that maximizes airflow
• Easy to clean and service
• Silicone-treated polyester wraps repel snow and water
• Allows snow to melt off the filter instead of soaking into it