Product Specifications
Height 3 in (76 mm)
Top Outside Diameter 2 in (51 mm)
Base Outside Diameter 2.625 in (67 mm)
Flange Inside Diameter 1.563 in (40 mm)
Flange Length 0.625 in (16 mm)
Flange Type Centered
Flanges 1
Package Quantity 1

Product Box Height 4.25 in (108 mm)
Product Box Length 4.63 in (117 mm)
Product Box Width 4.63 in (117 mm)
Top Material/Finish Chrome
Weight 0.5 lb (0.2 kg)

 

Another option that has a 40mm inlet is K&N RC-2310  the difference being that
RC-2310 has a outside lower diameter of 3".