K&N RU-1780: RU-1780 Round Straight Air Filter Flange Dia. (F): 2.063 in. (52 mm)
2.062'' (52 mm) Flange Dia. (F)
Round Straight Air Filter Flange Dia. (F): 2.063'' (52 mm) Outside Dia. (D): 3.5'' (89 mm) Length (L): 5'' (127 mm) Top Style: Rubber Flange Length (FL): 2.5'' (64 mm) Flange Angle (FA): 17º Flange Offset: 0''