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

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.

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Moroso Vacuum Pump Air/Oil Separators 85495

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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Moroso Vacuum Pump Air/Oil Separators 85471

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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Racing Automotive Group Vacuum Breather Tanks PRPC014BT

Oil Breather Tank, Round, Aluminum, Polished, Filtered Breather, Each

Part Number: RAU-PRPC014BT

Not Yet Reviewed

Estimated Ship Date: Dec 8, 2025 if ordered today

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Estimated Ship Date: Dec 8, 2025 if ordered today

Moroso Breather Tanks 85500

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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Moroso Breather Tanks 85465

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 )

Estimated Ship Date: Today

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Moroso Breather Tanks 85468

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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Moroso Breather Tanks 85751

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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Moroso Breather Tanks 85753

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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Moroso Breather Tanks 85391

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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Moroso Breather Tanks 85397

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 )

Estimated Ship Date: Today

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Moroso Dry Sump Breather Tanks 85475

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

Part Number: MOR-85475

Not Yet Reviewed

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Moroso Breather Tanks 85416

Billet Breather Tank Catch Can, Dual Inlet, Black, -12AN

Part Number: MOR-85416

Not Yet Reviewed

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Moroso Breather Tanks 85393

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

Part Number: MOR-85393

5.0 out of 5 stars ( 1 )

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Moroso Breather Tanks 85752

Catch Can Breather Tank, Aluminum, Black Wrinkle Powdercoated, -10AN Male Fittings, with Bracket, Each

Part Number: MOR-85752

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Moroso Breather Tanks 85459

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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Moroso Breather Tanks 85455

Oil Catch Can, Breather Tank, Breather, Two 1/2 in. NPT Fittings, Aluminum, Natural, 3.125 in. Diameter, 11.50 in. Height, Each

Part Number: MOR-85455

5.0 out of 5 stars ( 3 )

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Moroso Dry Sump Breather Tanks 85395

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

Part Number: MOR-85395

Not Yet Reviewed

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Moroso Breather Tanks 85467

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 )

Estimated Ship Date: Today

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Moroso Breather Tanks 85396

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 )

Estimated Ship Date: Today

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Moroso Breather Tanks 85469

Breather Tank, Round, Aluminum, Natural, Each

Part Number: MOR-85469

3.6 out of 5 stars ( 5 )

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Moroso Breather Tanks 85415

Billet Breather Tank Catch Can, Dual Inlet, Black, -10AN

Part Number: MOR-85415

Not Yet Reviewed

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Moroso Breather Tanks 85404

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 )

Estimated Ship Date: Today

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Moroso Breather Tanks 85461

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 )

Estimated Ship Date: Today

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Moroso Breather Tanks 85402

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 )

Estimated Ship Date: Today

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Moroso Breather Tanks 85412

Billet Breather Tank Catch Can, Single Inlet, Black, -12AN

Part Number: MOR-85412

Not Yet Reviewed

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