Axle, gear and transfer box breather extension kit

Option code:AXLBRE


When drivetrain assemblies such as your vehicle’s differentials case heat up under normal operation, the air inside expands and increases the pressure. To vent this additional pressure, most factory differentials have a one-way valve mounted to either the assembly itself, or on a short extension tube close by. Unfortunately, when the drivetrain assembly cools down, the air inside contracts, creating a vacuum. When cooling occurs during a water crossing, these one-way valves can draw water into the system, potentially causing expensive damage. Our axle breather kit is designed to provide a high flow, zero back pressure, zero vacuum breather system to keep your drivetrain free of water. This is achieved with a central high flow air filter and manifold that will allow up to four drivetrain assemblies to be vented to one central location, positioned high enough to avoid water during crossings.


  • Axle breather manifold is machined from billet aluminium and anodised making it lightweight and resistant the elements
  • The manifold has 4 axle breather ports allowing between 1 and 4 breather lines to be connected
  • The air filter is splash resistant with a washable high flow sintered bronze filter cartridge
  • 8mm polyethylene tubing is flexible, oil resistant, water resistant and heat resistant
  • 8mm tubing has been selected over the standard 6mm tubing to improve the breathability and reduce the chance of oil blockages in long breather lines
  • 8mm push-in fittings making the installation simple and fast


  • Avoids pressure accumulation in the differential housings
  • Easy to install
  • Particularly useful when traversing water crossings
  • Prevents differential oil contamination


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