The breathers for 4WD differentials and axles play a vital role in venting air pressure from drivetrain assemblies such as differentials, transmissions, and transfer cases. Many drivetrain assemblies come from the factory equipped with breathers. These original equipment breathers are typically either one-way valves mounted directly to the housing or remote-mounted with short tubes. These styles have many drawbacks, and the ARB Differential Breather Kit is designed to eliminate them by providing a high-flow, zero-backpressure, and zero-vacuum breather system. This kit is a replacement for factory breathers and includes enough fittings and tubing to connect two or more drivetrain assemblies to a central manifold. Additional tubing and push-in fittings to connect up to four assemblies are sold separately.
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