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Oil Catch Cans & Breather Tanks

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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.

Individual Parts

Results 1 - 25 of 40

Air, Oil, Separator Tank, Round, Aluminum, Natural, Male Fittings, -12AN, Mounting Clamp, Kit

Part Number: MOR-85495

3.67 out of 5 stars ( 3 )

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Air, Oil, Separator Tank, Aluminum, Polished, 3.125 in. Diameter, 6 in. Height, Each

Part Number: MOR-85471

5.0 out of 5 stars ( 1 )

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Oil Breather Tank, Vacuum/Dry Sump Breather, 1 qt., Round, Aluminum, Natural, Universal, Each

Part Number: MOR-85500

5.0 out of 5 stars ( 1 )

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BREATHER 1-WAY VAC NO BUNG

Part Number: PFF-08-0452

Not Yet Reviewed

Estimated Ship Date: Mar 10, 2026 if ordered today

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Estimated Ship Date: Mar 10, 2026 if ordered today

Oil Breather Tank, 1 qt., Round, Aluminum, Natural, Filtered Breather, Mounting Bracket, Petcock, Universal, Each

Part Number: MOR-85465

4.65 out of 5 stars ( 20 )

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Oil Breather Tank, Aluminum, Natural, Dual -10 AN 180 Degrees Apart, Each

Part Number: MOR-85468

4.44 out of 5 stars ( 9 )

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Oil Breather Tank, Aluminum, Natural, Dual -16 AN Female Thread, Dual Breathers, Each

Part Number: MOR-85391

3.0 out of 5 stars ( 1 )

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Breather Tank, Dry Sump Breather, 1 qt., Round, Aluminum, Natural, Filtered Breather, Universal, Each

Part Number: MOR-85475

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Oil Catch Can, Aluminum, Black Powdercoat, Round, 3 1/8 in. Diameter, 11.50 in. Height, Mounting Bracket Included, Each

Part Number: MOR-85753

5.0 out of 5 stars ( 2 )

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Breather Tank, Aluminum, Natural, Dual -16 AN Inlet, Each

Part Number: MOR-85393

5.0 out of 5 stars ( 1 )

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Oil Breather Tank, Compact, Round, 7 in. Tall, Aluminum, Black Anodized, Two -8 AN Male Fittings, Each

Part Number: MOR-85397

5.0 out of 5 stars ( 1 )

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Oil Catch Can, Aluminum, Black, Round, 3.13 in. Diameter, 11.50 in. Height, Each

Part Number: MOR-85751

5.0 out of 5 stars ( 2 )

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Breather Tank, Round, Aluminum, Natural, Each

Part Number: MOR-85469

3.6 out of 5 stars ( 5 )

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Oil Breather Tank, Dry Sump Breather, 1 qt., Round, Polyethylene, Black, -8 AN Inlet, Universal, Each

Part Number: MOR-85404

4.33 out of 5 stars ( 3 )

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Oil Breather Tank, Breather Tank, Two 3/8 in. NPT Female Bungs, 180 deg. Apart, 3 1/8 in. Dia, 11.50 in. Overall Height, Each

Part Number: MOR-85473

4.54 out of 5 stars ( 13 )

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Oil Breather Tank, 2.5 qt., Round, Aluminum, Natural, Filtered Breather, Universal, Each

Part Number: MOR-85466

4.27 out of 5 stars ( 15 )

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Separator Tank, Air/Oil, Aluminum, Natural, 3.125 in. Diameter, 7.0 in. Length, Each

Part Number: MOR-85467

5.0 out of 5 stars ( 5 )

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Oil Breather Tank, Cylindrical, 1 qt. Capacity, Aluminum, Natural, -10 AN Male Threads Inlet, Each

Part Number: MOR-85459

5.0 out of 5 stars ( 3 )

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Oil Catch Can, Aluminum, Natural, Round, 11.00 in. Tall, 7.00 in. Diameter, Each

Part Number: MOR-85395

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Oil Breather Tank, Compact, Round, 7 in. Tall, Aluminum, Polished, Two -8 AN Male Fittings, Each

Part Number: MOR-85396

5.0 out of 5 stars ( 1 )

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Oil Breather Tank, Dry Sump Breather, 1 qt., Round, Polyethylene, Black, -6 AN Inlet, Universal, Each

Part Number: MOR-85406

4.0 out of 5 stars ( 5 )

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Oil Breather Tank, Round, Aluminum, Natural, -8 AN Male Inlet, Each

Part Number: MOR-85458

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Mar 23, 2026 if ordered today

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Estimated Ship Date: Mar 23, 2026 if ordered today

Oil Breather Tank, Dry Sump Breather, 1 qt., Round, Polyethylene, Black, -10 AN Inlet, Universal, Each

Part Number: MOR-85402

4.75 out of 5 stars ( 12 )

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Oil Breather Tank, Aluminum, Natural, -6 AN Male Thread, Each

Part Number: MOR-85456

Not Yet Reviewed

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Breather Tank, Round, Aluminum, Natural, 1 qt. Capacity, -12 AN Male Threads Inlet, Each

Part Number: MOR-85461

4.5 out of 5 stars ( 2 )

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