K&N Round Straight Universal Air Filters:

Part # Flange Inside Dia. (F) Outside Dia. (D) Length (L) Flange Length (FL)
RU-32300.625 in (16 mm)1.375 in (35 mm)1.125 in (29 mm)0.375 in (10 mm)
RU-36300.75 in (19 mm)2 in (51 mm)2.5 in (64 mm)0.625 in (16 mm)
RU-01001.25 in (32 mm)3 in (76 mm)4 in (102 mm)0.75 in (19 mm)
RU-01101.25 in (32 mm)3 in (76 mm)5 in (127 mm)0.75 in (19 mm)
RU-00801.25 in (32 mm)3 in (76 mm)5 in (127 mm)0.625 in (16 mm)
RU-23101.563 in (40 mm)3 in (76 mm)2.5 in (64 mm)0.625 in (16 mm)
RU-11301.688 in (43 mm)3 in (76 mm)2.5 in (64 mm)0.625 in (16 mm)
R-10301.688 in (43 mm)3 in (76 mm)6 in (152 mm)1.5 in (38 mm)
RU-38501.688 in (43 mm)3.5 in (89 mm)10 in (254 mm)0.625 in (16 mm)
RU-03101.688 in (43 mm)5.25 in (133 mm)2 in (51 mm)0.625 in (16 mm)
RU-25701.75 in (44 mm)3 in (76 mm)2 in (51 mm)0.625 in (16 mm)
RU-25751.75 in (44 mm)3 in (76 mm)6 in (152 mm)0.625 in (16 mm)
RU-26851.75 in (44 mm)3 in (76 mm)3 in (76 mm)0.625 in (16 mm)
RU-10301.75 in (44 mm)3.5 in (89 mm)4.5 in (114 mm)1 in (25 mm)
RU-10401.75 in (44 mm)3.5 in (89 mm)5 in (127 mm)0.75 in (19 mm)
RU-03601.75 in (44 mm)3.5 in (89 mm)5 in (127 mm)0.625 in (16 mm)
R-10501.75 in (44 mm)3.5 in (89 mm)6 in (152 mm)0.625 in (16 mm)
RU-10501.75 in (44 mm)3.5 in (89 mm)6 in (152 mm)0.75 in (19 mm)
RU-03401.75 in (44 mm)4.5 in (114 mm)1.5 in (38 mm)0.625 in (16 mm)
RU-03701.75 in (44 mm)4.5 in (114 mm)2 in (51 mm)0.625 in (16 mm)
RU-03501.813 in (46 mm)5.5 in (140 mm)3 in (76 mm)0.625 in (16 mm)
RU-25601.875 in (48 mm)3 in (76 mm)1.5 in (38 mm)0.625 in (16 mm)
RU-33501.875 in (48 mm)3 in (76 mm)2 in (51 mm)0.625 in (16 mm)
RU-12801.875 in (48 mm)3 in (76 mm)4 in (102 mm)1 in (25 mm)
RU-04001.875 in (48 mm)3 in (76 mm)4 in (102 mm)0.625 in (16 mm)
RU-04101.875 in (48 mm)3 in (76 mm)5 in (127 mm)0.625 in (16 mm)
RU-04201.875 in (48 mm)3 in (76 mm)6 in (152 mm)0.625 in (16 mm)
RD-04501.875 in (48 mm)3.5 in (89 mm)4 in (102 mm)0.625 in (16 mm)
RD-04601.875 in (48 mm)3.5 in (89 mm)5 in (127 mm)0.625 in (16 mm)
RD-04701.875 in (48 mm)3.5 in (89 mm)6 in (152 mm)0.625 in (16 mm)
RU-27001.938 in (49 mm)3 in (76 mm)2 in (51 mm)0.625 in (16 mm)
RU-27601.938 in (49 mm)3 in (76 mm)2.5 in (64 mm)0.625 in (16 mm)
RP-51641.938 in (49 mm)3 in (76 mm)3 in (76 mm)0.625 in (16 mm)
RP-51191.938 in (49 mm)3 in (76 mm)4 in (102 mm)0.625 in (16 mm)
RU-14001.938 in (49 mm)3.5 in (89 mm)4 in (102 mm)2 in (51 mm)
RU-14101.938 in (49 mm)3.5 in (89 mm)5 in (127 mm)2 in (51 mm)
RU-14201.938 in (49 mm)3.5 in (89 mm)6 in (152 mm)2 in (51 mm)
RU-14022.062 in (52 mm)3.5 in (89 mm)4 in (102 mm)2 in (51 mm)
RU-18802.063 in (52 mm)3 in (76 mm)2.5 in (64 mm)0.625 in (16 mm)
RU-05102.063 in (52 mm)3.5 in (89 mm)5 in (127 mm)0.625 in (16 mm)
RU-17802.063 in (52 mm)3.5 in (89 mm)5 in (127 mm)2.5 in (64 mm)
RU-10602.063 in (52 mm)3.5 in (89 mm)5 in (127 mm)0.75 in (19 mm)
RU-10702.063 in (52 mm)3.5 in (89 mm)6 in (152 mm)0.75 in (19 mm)
RU-05702.063 in (52 mm)5.5 in (140 mm)2 in (51 mm)0.625 in (16 mm)
RD-05002.125 in (54 mm)3.5 in (89 mm)4 in (102 mm)0.875 in (22 mm)
RB-05002.125 in (54 mm)3.5 in (89 mm)4 in (102 mm)1 in (25 mm)
RB-05102.125 in (54 mm)3.5 in (89 mm)5 in (127 mm)1 in (25 mm)
RD-05102.125 in (54 mm)3.5 in (89 mm)5 in (127 mm)0.875 in (22 mm)
RD-05202.125 in (54 mm)3.5 in (89 mm)6 in (152 mm)0.875 in (22 mm)
RB-05202.125 in (54 mm)3.5 in (89 mm)6 in (152 mm)1 in (25 mm)
RU-38402.25 in (57 mm)3.5 in (89 mm)10 in (254 mm)0.625 in (16 mm)
RD-06002.25 in (57 mm)3.5 in (89 mm)4 in (102 mm)0.625 in (16 mm)
RU-06002.25 in (57 mm)3.5 in (89 mm)4 in (102 mm)0.625 in (16 mm)
RB-06002.25 in (57 mm)3.5 in (89 mm)4 in (102 mm)1 in (25 mm)
RU-17002.25 in (57 mm)3.5 in (89 mm)4 in (102 mm)1 in (25 mm)
RU-17102.25 in (57 mm)3.5 in (89 mm)5 in (127 mm)1 in (25 mm)
RU-10802.25 in (57 mm)3.5 in (89 mm)5 in (127 mm)0.75 in (19 mm)
RB-06102.25 in (57 mm)3.5 in (89 mm)5 in (127 mm)1 in (25 mm)
RU-06102.25 in (57 mm)3.5 in (89 mm)5 in (127 mm)0.625 in (16 mm)
RD-06102.25 in (57 mm)3.5 in (89 mm)5 in (127 mm)0.625 in (16 mm)
RD-06202.25 in (57 mm)3.5 in (89 mm)6 in (152 mm)0.625 in (16 mm)
RU-06202.25 in (57 mm)3.5 in (89 mm)6 in (152 mm)0.625 in (16 mm)
RB-06202.25 in (57 mm)3.5 in (89 mm)6 in (152 mm)1 in (25 mm)
RU-10902.25 in (57 mm)3.5 in (89 mm)6 in (152 mm)0.75 in (19 mm)
RU-17202.25 in (57 mm)3.5 in (89 mm)6 in (152 mm)1 in (25 mm)
RU-06302.25 in (57 mm)4.5 in (114 mm)4 in (102 mm)0.625 in (16 mm)
RU-06402.25 in (57 mm)4.5 in (114 mm)5 in (127 mm)0.625 in (16 mm)
RU-06502.25 in (57 mm)5.5 in (140 mm)2.5 in (64 mm)0.625 in (16 mm)
RU-06602.25 in (57 mm)5.5 in (140 mm)3 in (76 mm)0.625 in (16 mm)
RU-06902.25 in (57 mm)5.5 in (140 mm)3.5 in (89 mm)0.625 in (16 mm)
RU-06802.25 in (57 mm)5.5 in (140 mm)5 in (127 mm)0.625 in (16 mm)
RD-07002.5 in (64 mm)3.5 in (89 mm)4 in (102 mm)0.625 in (16 mm)
RB-07002.5 in (64 mm)3.5 in (89 mm)4 in (102 mm)1 in (25 mm)
RB-07102.5 in (64 mm)3.5 in (89 mm)5 in (127 mm)1 in (25 mm)
RD-07102.5 in (64 mm)3.5 in (89 mm)5 in (127 mm)0.625 in (16 mm)
RD-07202.5 in (64 mm)3.5 in (89 mm)6 in (152 mm)0.625 in (16 mm)
RB-07202.5 in (64 mm)3.5 in (89 mm)6 in (152 mm)1 in (25 mm)
RB-08002.625 in (67 mm)4 in (102 mm)4 in (102 mm)1 in (25 mm)
RB-08102.625 in (67 mm)4 in (102 mm)5 in (127 mm)1 in (25 mm)
RU-26302.625 in (67 mm)4.5 in (114 mm)2 in (51 mm)0.625 in (16 mm)
RU-26402.625 in (67 mm)4.5 in (114 mm)3 in (76 mm)0.625 in (16 mm)
RU-26502.625 in (67 mm)4.5 in (114 mm)4 in (102 mm)0.625 in (16 mm)
RU-09102.688 in (68 mm)4.5 in (114 mm)5 in (127 mm)0.625 in (16 mm)
RU-14702.75 in (70 mm)4 in (102 mm)6 in (152 mm)1 in (25 mm)
RU-31902.75 in (70 mm)4 in (102 mm)6 in (152 mm)2 in (51 mm)
RU-14802.75 in (70 mm)4 in (102 mm)7 in (178 mm)1 in (25 mm)
RU-09402.75 in (70 mm)5.5 in (140 mm)3 in (76 mm)0.625 in (16 mm)
RU-09502.75 in (70 mm)5.5 in (140 mm)4 in (102 mm)0.625 in (16 mm)
RU-09602.75 in (70 mm)5.5 in (140 mm)5 in (127 mm)0.625 in (16 mm)
RU-09802.75 in (70 mm)7 in (178 mm)3 in (76 mm)0.625 in (16 mm)
RU-29402.75 in (70 mm)7 in (178 mm)7 in (178 mm)0.625 in (16 mm)
RX-50322.813 in (71 mm)4.063 in (103 mm)7 in (178 mm)0.75 in (19 mm)
RU-24102.875 in (73 mm)4 in (102 mm)5.375 in (137 mm)0.625 in (16 mm)
RU-16202.875 in (73 mm)4 in (102 mm)6 in (152 mm)0.625 in (16 mm)
RU-37102.875 in (73 mm)4.5 in (114 mm)5 in (127 mm)0.625 in (16 mm)
RB-09003 in (76 mm)4.313 in (110 mm)4 in (102 mm)1 in (25 mm)
RB-09103 in (76 mm)4.313 in (110 mm)5 in (127 mm)1 in (25 mm)
RU-24203 in (76 mm)5 in (127 mm)3 in (76 mm)0.625 in (16 mm)
RU-24303 in (76 mm)5 in (127 mm)5 in (127 mm)0.625 in (16 mm)
RU-28203 in (76 mm)5 in (127 mm)6.5 in (165 mm)0.625 in (16 mm)
RA-09703 in (76 mm)7 in (178 mm)2 in (51 mm)0.625 in (16 mm)
RA-09803 in (76 mm)7 in (178 mm)3 in (76 mm)0.625 in (16 mm)
RA-09903 in (76 mm)7 in (178 mm)4 in (102 mm)0.625 in (16 mm)
RU-90403.063 in (78 mm)6.875 in (175 mm)5.938 in (151 mm)0.563 in (14 mm)
RA-09503.063 in (78 mm)7 in (178 mm)3 in (76 mm)0.625 in (16 mm)
RA-09603.063 in (78 mm)7 in (178 mm)4 in (102 mm)0.625 in (16 mm)
RU-90043.063 in (78 mm)7 in (178 mm)6 in (152 mm)0.625 in (16 mm)
RU-17903.5 in (89 mm)5 in (127 mm)3 in (76 mm)0.625 in (16 mm)
RU-51143.5 in (89 mm)5 in (127 mm)5.625 in (143 mm)0.625 in (16 mm)
RU-17853.5 in (89 mm)5 in (127 mm)8.5 in (216 mm)0.625 in (16 mm)
RD-14504 in (102 mm)7 in (178 mm)6 in (152 mm)1 in (25 mm)
RD-14604 in (102 mm)7 in (178 mm)9 in (229 mm)1 in (25 mm)
RU-32205 in (127 mm)6.5 in (165 mm)10 in (254 mm)1 in (25 mm)
RU-30205 in (127 mm)6.5 in (165 mm)9 in (229 mm)1 in (25 mm)
RU-32706 in (152 mm)7.5 in (191 mm)10 in (254 mm)1 in (25 mm)
RU-30406 in (152 mm)7.5 in (191 mm)12 in (305 mm)1 in (25 mm)
RU-18506 in (152 mm)7.5 in (191 mm)4.5 in (114 mm)1 in (25 mm)
RU-30606 in (152 mm)7.5 in (191 mm)6 in (152 mm)1 in (25 mm)
RU-32606 in (152 mm)7.5 in (191 mm)8 in (203 mm)1 in (25 mm)