AMSOIL EaAB Crankcase Breather Filters (EaAB)

AMSOIL EaAB Crankcase Breather Filters (EaAB) AMSOIL EaAB Crankcase Breather Filters provide excellent oil vapor control, increased efficiency and better engine performance in street rod and racing applications. EaAB Filters are a perfect complement to EaAR Filters, combining to provide a superior air filtration system in high-performance and severe-service applications.

Why Are Crankcase Breathers Necessary?

Pressure builds in the engine crankcase due to vapor from the hot engine oil and from exhaust gases that escape past the piston rings. A crankcase breather system is used to release this pressure. If the breather system becomes blocked, the crankcase pressure builds internally. As the pressure increases, the oil is pushed through the area offering the least resistance, such as the dipstick or a seal. Crankcase breather filters are employed to ensure the crankcase does not become blocked with foreign materials as pressurized gases escape.


AMSOIL EaAB Filters are compatible with engines, transmissions and oil tanks, but are mainly designed for installation on valve covers used in high-performance and racing applications. EaAB Filters clamp directly to rubber tubing or are pushed onto rubber grommets. The EaAB1511, EaAB1513 and EaAB1514 feature a chrome shield for added protection from direct contact with dirt and grime, and all EaAB Filters feature a chrome ring with AMSOIL engraved into the top. The EaAB1491 is a push-in filter, the others are all clamp-on designs.

Quality Construction

AMSOIL EaAB Filters are made with the same super high-quality synthetic nanofibers used in other Ea Filters. Their wire-backed pleats provide additional strength and filter longevity. The signature AMSOIL Ea blue media along with the chrome detailing make these filters an attractive fit.


AMSOIL EaAB Filters are cleanable, offering longer filter life. They are cleaned in the same manner as other Ea Air Filters; using either low-pressure shop air on the clean side or a vacuum on the dirty side.


AMSOIL EaAB Filters are made for any vehicle or piece of equipment that can accept breather elements. The breathers are designed for installation on engine valve covers and other breather tubes, but can also be used on transmissions and industrial equipment. See the product dimension chart below for appropriate filter.

Stock# Flange Inner Diameter Filter Outer Diameter Height Mounting
EaAB1370 1.0" 2.0" 1.5" Clamp-on
EaAB1491 1.25" 3.0" 1.75" Push-in
EaAB1511 1.0" 3.0" 2.5" Clamp-on
EaAB1513 1.375" 3.0" 2.5" Clamp-on
EaAB1514 1.5" 3.0" 2.5" Clamp-on
EaAB2480 0.5625" 1.375" 1.125" Clamp-on

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