Direct Fit:2003-2007 Accord 3.0L Replacement OEM Part Number: 19010RCAA01, 19010RCAA02, 19010RCAA51, 19010RCAA52, 19010RCAA53 Specification - Core Width: 28-1/4 in; Core Height: 14-9/16 in; Core Thickness: 5/8in; Inlet Diameter: 1-1/4 in Outlet Diameter: 1-1/4 in IATF16949 Certification: Designed with outstanding durability, in compliance with the original specifications, and suitable for direct replacement. Quick and Easy Installation: Direct-fit design eliminates the need for modifications during installation