Exhaust manifold gasket with part number 320/06398 from the GX-AFTER offer. It is a high-temperature sealing element, dedicated to JCB machines manufactured after 2005. The gasket is designed specifically for JCB DieselMax and JCB EcoMax engines, ensuring a tight connection between the cylinder head and the exhaust manifold in backhoe loaders, telehandlers, and excavators.
GX-AFTER gaskets are made of materials resistant to extreme temperature fluctuations and exhaust pressure. They prevent blowouts ("ticking"), which can lead to cylinder head surface damage and decreased turbocharger efficiency.
| Category | Models (with DieselMax/EcoMax engine) |
|---|---|
| Backhoe Loaders | 3CX, 4CX (post-2005 models) |
| Telehandlers | Loadall (Series: 531, 535, 540, 541 and others with JCB engine) |
| Excavators | JS (e.g., JS130, JS145, JS160, JS220 with JCB engine) |
| Wheel Loaders | Front loaders (e.g., 411, 416 with JCB engine) |
| Others | Generators (JCB Power Products) |
Note: The gasket fits only JCB manufactured engines (DieselMax/EcoMax). Does not fit older models with Perkins engines.
When replacing the exhaust manifold gasket, it is recommended to replace the studs and copper-plated nuts of the manifold, which often seize or corrode. It is also worth checking the condition of the turbocharger gasket.
Never install a new gasket on a dirty or uneven surface. Thoroughly clean the head and manifold mating surfaces. If the manifold is warped, the new gasket will quickly burn out – manifold resurfacing may be necessary.
The gasket prevents exhaust leaks before the turbo.
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Never. Exhaust gaskets deform (crush) during the first installation to conform to the surface. Reuse will not ensure tightness.
DieselMax is a family of engines designed and manufactured by JCB (since 2004). Previously, JCB used Perkins engines. 320/06398 is a specific part for JCB design.
Modified JCB DieselMax engines were used to power the "JCB Dieselmax" vehicle, which broke the diesel land speed record in 2006, reaching 563 km/h. This proves the potential of this design!
Do you have doubts or need confirmation to avoid costly downtime? Call us. Our experts will help you select the right part to get your equipment back to work as quickly as possible.
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Gasket for the exhaust manifold, suitable for JCB 3CX 4CX backhoe loaders and telehandlers with a JCB engine after 2005.

















