K&N Engineering RU-0210 Universal Round Straight Air Filter - Rubber End Cap engine-valve-train-shims They are pre drilled for

They are pre drilled for internal wiring

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K&N Engineering RU-0210 Universal Round Straight Air Filter - Rubber End Cap engine-valve-train-shims They are pre drilled forMounting Flange Inside Diameter 1 11 16in. MM 43, Filter Outside Diameter 3in. MM 76, Filter Length 5in. MM 127, Flange Length 5 8in. Flange Type Centered. When selecting one of K&Ns universal round straight air filters, you should consider the following dimensions as they relate to the specification chart:. Mounting Flange Inside Diameter This is the most critical dimension and should be very close to the diameter of the applications inlet flange.