One New Aftermarket Replacement Valve Guide Fits International Harvester (IH) / Fits FARMALL TractorsThis aftermarket replacement valve guide fits the cylinder head of Fits International Harvester (IH) and Fits FARMALL gasoline engines, keeping intake and exhaust valves precisely centered for proper sealing and reliable engine performance. Eight (8) valve guides are used per engine. Worn or damaged valve guides can cause excessive oil consumption, blue exhaust smoke, and valve instability -- replacing them restores proper valve-to-guide clearance and combustion efficiency.Compatible ModelsFits International Harvester / Fits FARMALL: A, AV, Super A (up to SN 255417), Super A-1, Super AV, Super AV-1, B, BN, C, Super C, 100, 130, 140, 200, 210, 225, 230, 240, 330 (SN 100500 and before), 340, 404, 424, 444, 500, 500C, 504, 770, 780, 2404, 2504, 3514, 4000Fits International Harvester Industrial / Utility: T4, T4B, T5, T5B, T5C, T340, UC135, C135, C146, C153, H30F, H30RNote: For models 330 and 340, this guide fits serial numbers 100500 and before. For Super A, fits up to SN 255417. Verify fitment by serial number before ordering.Replaces Part Number(s):356583R21, 356583R2, 356583R11, 356583R1, 356583R91, 7356583, RP-356583R2New aftermarket replacement part - not remanufactured, not used.