This kn filter is just 3" in hight, but has a large base of 5" in diameter. The inlet flange is 3" in internal diameter. The soft rubber air filter flange will snuggly fit onto any 76mm (3") inlet pipe. This filter should be good for over 300 KW @ the Wheels. Small in hight but big in flow!

Part RU-2420 Product Specifications

Product Style: Round Straight Universal Air Filter
Flange Inside Diameter: 3 in (76 mm)
Flange Length: 0.625 in (16 mm)
Flange Type: Centered
Height: 3 in (76 mm)
Outside Diameter: 5 in (127 mm)
Top Style: Rubber
Weight: 0.97 lb (0.44 kg)