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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Vibrant Performance Gen 3 Catch Cans 12761

Catch Can, Round, Aluminum, Black Anodized, 2-Port model, 4.40 in. Diameter, 8.25 in. Height, Each

Part Number: VPE-12761

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Summit Racing™ Breather Tanks SUM-300107

Breather Tank, Bolt-in, 16 oz. Capacity, Round, Aluminum, Polished, Vented with Filtered Breather, (1) -12 AN Male Inlet Port, Universal, Each

Part Number: SUM-300107

5.0 out of 5 stars ( 2 )

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Improved Racing CCS Oil Catch Can Kits CCS-GM-101

Improved Racing CCS Oil Catch Can Kits CCS-GM-101

Oil Catch Can, CCS, 7 oz., Oil Separator, Recirculating, Aluminum, Black, Round, Buick, Chevy, Cadillac, Pontiac, 5.3L, 5.7L, 6.0L, 6.2L, 7.0L, Kit

Part Number: IRP-CCS-GM-101

5.0 out of 5 stars ( 1 )

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K&N Oil Catch Cans 81-0805

Oil Catch Can, Round, Aluminum, Black, 6.0 oz. Capacity, Cadillac, Chevy, GMC, Kit

Part Number: KNN-81-0805

5.0 out of 5 stars ( 5 )

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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 )

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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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Vibrant Performance Gen 3 Catch Cans 12760

Catch Can, Round, Aluminum, Black Anodized, 2-Port model, 4.40 in. Diameter, 4.93 in. Height, Each

Part Number: VPE-12760

5.0 out of 5 stars ( 1 )

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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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Allstar Performance Mini Breather Tanks ALL36142

Oil Breather Tank, Round, Aluminum, Natural, Universal, Flat Mount, Each

Part Number: AAF-ALL36142

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Moroso PCV Air/Oil Separators 85531

Oil Catch Cans, Air/Oil Separator Tank, Aluminum, Black Anodized, Large Body, Kit

Part Number: MOR-85531

4.5 out of 5 stars ( 2 )

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Ford Performance Parts Coyote Oil-Air Separator Kits for 2018-2023 MUSTANG - M-6766-A50A

Separator Tank, Coyote Oil-Air, Plastic, Black, Male Quick-connect, Ford, Mustang GT/Bullet/Mach 1, 5.0L, Each

Part Number: FMS-M-6766-A50A

4.43 out of 5 stars ( 23 )

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Vibrant Performance Gen 3 Catch Cans 12765

Catch Can, Round, Aluminum, Black Anodized, 4-Port model, 4.40 in. Diameter, 4.93 in. Height, Each

Part Number: VPE-12765

5.0 out of 5 stars ( 1 )

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Allstar Performance Breather Tanks ALL36109

Breather Tank, Round, Aluminum, Natural, 3 in. Diameter, 11.5 in. Tall, 3/8 NPT Bungs, Universal, Each

Part Number: AAF-ALL36109

4.77 out of 5 stars ( 30 )

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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

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Dorman Oil Catch Can Kits 46110

Oil Catch Cans, Black Anodized, Aluminum, 3.5 oz Capacity, 4 in. Height, 2.38 in. Diameter, Hose Barb, Rubber Hose Included, Universal, Kit

Part Number: RNB-46110

5.0 out of 5 stars ( 1 )

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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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Radium Engineering Catch Can Kits 20-0008-FL

Universal Catch Can, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, Each

Part Number: RDM-20-0008-FL

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Vibrant Performance Gen 3 Catch Cans 12762

Catch Can, Round, Aluminum, Black Anodized, 2-Port model, 4.40 in. Diameter, 10.47 in. Height, Each

Part Number: VPE-12762

5.0 out of 5 stars ( 1 )

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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 Dry Sump Breather Tanks 85395

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

Part Number: MOR-85395

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Moroso Breather Tanks 85473

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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K&N Oil Catch Cans 81-0804

Oil Catch Can, Round, Aluminum, Black, 6.0 oz. Capacity, Cadillac, Chevy, GMC, Kit

Part Number: KNN-81-0804

5.0 out of 5 stars ( 4 )

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Radium Engineering Universal Catch Cans 20-0072

Oil Catch Can, Universal Catch Can, Round, 20 oz. Capacity, Aluminum, Black, Kit

Part Number: RDM-20-0072

Not Yet Reviewed

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K&N Oil Catch Cans 81-0812

Oil Catch Can, Aluminum, Black, Round, 6 oz. Capacity, Chevrolet, GMC, Kit

Part Number: KNN-81-0812

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