One New Aftermarket Replacement Tachometer Fits International Harvester (IH) / Fits FARMALL Diesel TractorsThis aftermarket replacement diesel tachometer installs in the instrument panel of Fits International Harvester (IH) and Fits FARMALL 400 and 450 series tractors, restoring accurate engine RPM readings. Fits diesel-engine models only -- verify your tractor is equipped with a diesel engine before ordering. The housing is powder-coated IH Red to match original factory appearance.Specifications Housing diameter: 3.340" Housing depth: 2.050" Finish: Powder coat IH Red Mounting stud spacing: 2-5/8" center to center Note: Original factory bracket uses 2-3/4" stud spacing -- bracket modification may be required for direct bolt-in installation. Compatible ModelsFits International Harvester (IH) / Fits FARMALL -- Diesel Engine Models Only: Fits FARMALL 400, Fits FARMALL 450, Fits International W400, Fits International W450Replaces Part Number(s):364395R91Aftermarket Interchange Numbers1707-0506, IHS1500New aftermarket replacement part - not remanufactured, not used.