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Oil Catch Cans & Breather Tanks
Oil catch cans and breather tanks look similar and do similar jobs, but they serve different purposes.
Oil Catch Cans
Normally, the PCV (positive crankcase ventilation)...
Oil catch cans and breather tanks look similar and do similar jobs, but they serve different purposes.
Oil Catch Cans
Normally, the PCV (positive crankcase ventilation) valve uses intake vacuum to relieve the pressure inside your crankcase, but that can result in oil mist and other blow-by contaminants building up on the valve and pistons, especially in direct-injection engines. An oil catch can (sometimes called an air/oil separator) is installed between the PCV valve and the intake, where it removes contaminants and allows only clean air to return to the intake manifold. Some have a reservoir that needs to be drained...
Oil catch cans and breather tanks look similar and do similar jobs, but they serve different purposes.
Oil Catch Cans
Normally, the PCV (positive crankcase ventilation) valve uses intake vacuum to relieve the pressure inside your crankcase, but that can result in oil mist and other blow-by contaminants building up on the valve and pistons, especially in direct-injection engines. An oil catch can (sometimes called an air/oil separator) is installed between the PCV valve and the intake, where it removes contaminants and allows only clean air to return to the intake manifold. Some have a reservoir that needs to be drained regularly, while others are plumbed to return the oil to the crankcase.
Breather Tanks
In forced induction and racing applications, the build-up of crankcase pressure can be much greater, so a breather tank is designed to vent that excess pressure into the atmosphere. They capture some blow-by with a catch can and air filter, and they may have an oil return. Importantly, breather tanks may not meet local emissions standards.
Top Brands
These devices are easy insurance for your high performance engine, and some builders use both a catch can and a breather tank. Summit Racing Equipment carries catch cans from trusted brands like Moroso, Mishimoto, Canton Racing, Ford Performance, JLT Performance, and many more.
Showing In Stock Items. Show All 14 Items.
Oil Catch Cans, Differential/Transmission Vent Tank, Sheet Metal Mount, -8AN Fitting, Each
Part Number: JOE-12309
Estimated Ship Date: Today
Estimated Ship Date: Today
Oil Catch Cans, Differential/Transmission Vent Tank, 1.50 in. Tube Mounting Clamp, -8AN Fitting, Each
Part Number: JOE-12301
Not Yet Reviewed
Estimated Ship Date: Mar 17, 2026 if ordered today
Estimated Ship Date: Mar 17, 2026 if ordered today
Billet Breather Tank Catch Can, Single Inlet, Black, -8AN
Part Number: MOR-85410
Not Yet Reviewed
Estimated Ship Date: Mar 30, 2026 if ordered today
Estimated Ship Date: Mar 30, 2026 if ordered today
Catch Can, Universal, 7 oz. Capacity, -8 AN Fittings, -8 AN Hose, Billet Aluminum, Black, Kit
Part Number: RDM-20-1808-FL
Not Yet Reviewed
Estimated Ship Date: Mar 20, 2026 if ordered today
Estimated Ship Date: Mar 20, 2026 if ordered today
Oil Breather Tank, Compact, Round, 7 in. Tall, Aluminum, Black Anodized, Two -8 AN Male Fittings, Each
Part Number: MOR-85397
Estimated Ship Date: Today
Estimated Ship Date: Today
Oil Breather Tank, Compact, Round, 7 in. Tall, Aluminum, Polished, Two -8 AN Male Fittings, Each
Part Number: MOR-85396
Estimated Ship Date: Today
Estimated Ship Date: Today
Oil Breather Tank, Dry Sump Breather, 1 qt., Round, Polyethylene, Black, -8 AN Inlet, Universal, Each
Part Number: MOR-85404
Estimated Ship Date: Today
Estimated Ship Date: Today
Oil Breather Tank, Round, Aluminum, Natural, -8 AN Male Inlet, Each
Part Number: MOR-85458
Estimated Ship Date: Mar 30, 2026 if ordered today
Estimated Ship Date: Mar 30, 2026 if ordered today
PCV Air, Oil Separator Tank, Aluminum, Black Anodized, Universal, Kit
Part Number: TFS-K51400852
Estimated Ship Date: Today
Estimated Ship Date: Today
PCV Air, Oil Separator Tank, Aluminum, Black Anodized, Universal, Each
Part Number: TFS-51400850
Estimated Ship Date: Today
Estimated Ship Date: Today
PCV Air, Oil Separator Tank, Aluminum, Black Anodized, Universal, Kit
Part Number: TFS-K51400850
Estimated Ship Date: Today
Estimated Ship Date: Today
PCV Air, Oil Separator Tank, Aluminum, Black Anodized, Universal, Pair
Part Number: TFS-51400852
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Air Oil Separator-Return, Crankcase, 7 oz. Capacity, -6 AN, Billet Aluminum, Black, for use on Honda®, S2000, Kit
Part Number: RDM-20-0096-FL
Not Yet Reviewed
Estimated Ship Date: Mar 19, 2026 if ordered today
Estimated Ship Date: Mar 19, 2026 if ordered today
