K&N RU-1785: RU-1785 Round Straight Air Filter Flange Dia. (F): 3.5 in. (89 mm)
3.5'' (89 mm) Flange Dia. (F)
Round Straight Air Filter Flange Dia. (F): 3.5'' (89 mm) Outside Dia. (D): 5'' (127 mm) Length (L): 8.5'' (216 mm) Top Style: Rubber Flange Length (FL): 0.625'' (16 mm) Flange Angle (FA): 0º Flange Offset: 0''