Key Features

• Genuine OEM Seal — designed and tested to meet John Deere original equipment standards for fit, performance, and durability.
• High-Temperature Resistance — withstands the extreme heat and pressure generated by exhaust gases in diesel engines.
• Prevents Exhaust Leaks — helps maintain proper exhaust routing and engine efficiency while reducing noise.
• Durable Construction — resists thermal cycling and deformation under heavy engine load.
• Precision Fit — accurate dimensions and hole spacing ensure correct sealing between cylinder head and exhaust manifold.
• Recommended Replacement — ideal during exhaust manifold servicing or engine overhaul to ensure a proper sealing surface and long-lasting performance.

Product Details

• Product Type: Exhaust manifold gasket
• Brand: John Deere
• Part Number: R521439
• Material: High-temperature gasket material
• Application: Seals the connection between the engine cylinder head and exhaust manifold
• Function: Helps prevent exhaust leaks, enhances exhaust flow efficiency, and protects engine components from heat exposure

Compatibility

The John Deere R521439 Engine Exhaust Manifold Gasket fits a range of diesel engines used across tractors, loaders, industrial machines, and other equipment where this specific gasket is specified.

• Typical compatible machines:
  • Compact & Utility Tractors: 4M / 5M Series (e.g., 4066R, 4067R, 4066M, 4067M)
  • Utility & Row-Crop Tractors: 6M Series (6M-95 through 6M-250); 6R Series (6R-110 through 6R-250); 7R / 8R Series
  • Construction & Industrial Equipment: Backhoe loaders (e.g., 310L, 310SL); Wheel loaders (e.g., 444K, 524K); Excavators (e.g., E210, E240)
  • Harvesters & Combine Equipment: S-Series combines; Forage harvesters
• Compatibility may vary depending on engine type, machine configuration and production year — always confirm with your equipment’s parts catalogue or official dealer lookup before ordering.