(1): ARB differential breather kits are important to vent air pressure in drivetrain assemblies, and they eliminate the shortcomings of your factory breathers—especially when driving through water crossings. ARB units are high-flow, zero backpressure, zero vacuum breather systems. Each features a high-flow air filter within a central manifold that will allow up to four drivetrain assemblies to be vented to one central location--ideally somewhere on the vehicle that will be above the water level at all times. ARB differential breather kits are intended to replace your factory breathers and contain enough fittings and tubing to connect at least two drivetrain assemblies. Additional features and benefits include: * Axle breather manifold is machined from billet aluminum and anodized, making it lightweight and resistant to the elements * The manifolds have four axle breather ports, allowing for 1-4 breather lines to be connected * Very compact design, allowing them to be installed in virtually any location * The kits come with self-tapping screws, but the manifold mounting holes are large enough to allow mounting using an M6 (1/4 in.) bolt or stud, which is the common size in most vehicle engine bays * The air filters are the ARB compressor air filters, which are splash-resistant with washable high-flow sintered bronze filter cartridges * 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 airflow and reduce the chance of oil blockages in long breather lines * 8mm push-in fittings make installation simple and fast * Kits include anodized aluminum manifold with 5 ports (breather lines and air filter) and 2 mounting holes, air filter assembly, fittings, plugs, polyethylene tubing, screws, and cable ties
Going to post this on the ARB website as well but I installed this on a 2021 subaru forester sport. MUST KNOW IF YOU ARE INSTALLING ON SUBARU, SUBARU USES A PRESS FIT BREATHER IN REAR DIFFERENTIAL. Before anything know how to drop your rear differential plenty of videos on youtube to show you but can alwasy crawl underneath it and see whats holding it up suggest using a jack to help lower the diff. With this you can either pry out the entire fitting or do what I did and expand the already 8mm hole. Firstly pry off the crimp set top portion of the brather its loose and spins see pic below. Then i stepped up using 1/4-5/16-3/8 drill bits. Go slow and stay as straight as possible. While going up in drill bit sizes test fit the 1/8 27 NPT tap as to not over expand the hole. Once the tap starts to grip a cut threads go slow going back and forth as to not break the tap. From there clean ALL METAL DEBRIS FROM DIFFERENTIAL COVER BEFORE INSTALLING BACK ONTO DIFFERENTIAL. Put everything back and tighten everything back down to torque specs and fill differential and run tube and mount ARB manifold in engine bay at your selected height.
Do I need 2 ?
This kit will come with all of the breathers needed for underneath your vehicle!
Hello, my fellow Rally freaks. This ARB breather setup is exactly what I'm looking for for low water fording, but I am unsure if it will fit my 2025 Outback Wilderness. Ant ideas? Thanks again.
It can be made to fit yes but it's not something that will bolt up and will require some custom work.
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