Quiet baffle by Vance & Hines Dimensions: O.D. on Front: 2 3/8 in. O.D. on Back: 2 3/8 in. I.D. of Center Baffle: 1 1/4 in. outlet end I.D. of Center Baffle: 1 3/4 in. inlet end Length: 13 1/8 in. Can Be Used With Wrap: Yes Wrap Included: Yes Mounting Bolts Included: Yes (one) Threaded Insert for Mounting: Yes Mounting Bolt on End or Side: Side