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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 383

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 )

Estimated Ship Date: Tomorrow

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Separator Tank, Coyote Oil-Air, Plastic, Black, Male Quick-connect, Ford, F-150, Mustang GT/Boss 302/GT350, 5.0L, 5.2L, Each

Part Number: FMS-M-6766-A50

4.87 out of 5 stars ( 63 )

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Radium Engineering Catch Can Kit GM LS Engine Fluid Lock

Part Number: RDM-20-0260-FL

5.0 out of 5 stars ( 1 )

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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

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Tomorrow

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Oil Catch Can, Oil/Air Separator, Plastic, Left Side, Ford, 5.2L, Kit

Part Number: FMS-M-6766-A50S

4.78 out of 5 stars ( 9 )

Estimated Ship Date: Tomorrow

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

Part Number: RDM-20-0008-FL

Not Yet Reviewed

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Air Oil Separator-Return Dual, PCV, Crankcase, 7 oz. Capacity, -6 AN, Billet Aluminum, Black, for use on Honda®, S2000, Kit

Part Number: RDM-200772

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Oil Catch Can, CCS, 7 oz., Oil Separator, Recirculating, Aluminum, Black, Round, Chevy, Convertible, Kit

Part Number: IRP-CCS-GM-C83

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Oil Catch Can, CCS, 3.5 oz., Oil Separator, Recirculating, Aluminum, Black, Round, Dodge, 6.2L, Kit

Part Number: IRP-CCS-CH-100

Not Yet Reviewed

Estimated Ship Date: Jan 22, 2026 if ordered today

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Estimated Ship Date: Jan 22, 2026 if ordered today

Catch Can, Dual, PCV and Crankcase, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, Cadillac, Kit

Part Number: RDM-20-1564-FL

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

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Estimated Ship Date: Jan 12, 2026 if ordered today

Oil Catch Can, CCS, 7 oz., Oil Separator, Recirculating, Aluminum, Black, Round, Chevy, Convertible, Kit

Part Number: IRP-CCS-GM-C81

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Oil Catch Can, CCS, 7 oz., Oil Separator, Recirculating, Aluminum, Black, Round, Ford, 2.7L, Kit

Part Number: IRP-CCS-FR-104

Not Yet Reviewed

Estimated Ship Date: Jan 22, 2026 if ordered today

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Estimated Ship Date: Jan 22, 2026 if ordered today

Oil Catch Can, CCS, 7 oz., Oil Separator, Recirculating, Aluminum, Black, Round, Cadillac, Chevy, Pontiac, LS, Kit

Part Number: IRP-CCS-GM-107

Not Yet Reviewed

Estimated Ship Date: Jan 22, 2026 if ordered today

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Estimated Ship Date: Jan 22, 2026 if ordered today

Catch Can, Crankcase, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, for use on Honda®, Kit

Part Number: RDM-20-0825-FL

Not Yet Reviewed

Estimated Ship Date: Jan 16, 2026 if ordered today

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Estimated Ship Date: Jan 16, 2026 if ordered today

Catch Can, Dual, PCV and Crankcase, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, Chevrolet, Kit

Part Number: RDM-20-0787-FL

Not Yet Reviewed

Estimated Ship Date: Jan 13, 2026 if ordered today

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Estimated Ship Date: Jan 13, 2026 if ordered today

Catch Can, PCV, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, Cadillac, Chevy, GMC, Kit

Part Number: RDM-20-0233-FL

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Catch Can, Dual, PCV and Crankcase, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, for use on Honda®, Kit

Part Number: RDM-20-0826-FL

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Catch Can, Dual, PCV and Crankcase, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, Ford, Kit

Part Number: RDM-20-0358-FL

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Catch Can, Dual, PCV and Crankcase, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, Subaru, Kit

Part Number: RDM-20-0756-FL

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

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Estimated Ship Date: Jan 12, 2026 if ordered today

Catch Can, Dual, PCV and Crankcase, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, Scion, Subaru, Toyota, Kit

Part Number: RDM-20-0903-FL

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

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Estimated Ship Date: Jan 12, 2026 if ordered today

Catch Can, Crankcase, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, Volkswagen, Kit

Part Number: RDM-20-0887-FL

Not Yet Reviewed

Estimated Ship Date: Jan 12, 2026 if ordered today

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Estimated Ship Date: Jan 12, 2026 if ordered today

Catch Can, Dual, PCV and Crankcase, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, Subaru, Saab, Kit

Part Number: RDM-20-0608-FL

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Air Oil Separator-Return Kit 2015+ Subaru STi

Part Number: RDM-20-0607

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Catch Can, PCV or Crankcase, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, for use on Honda®, Kit

Part Number: RDM-20-0336-FL

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

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Estimated Ship Date: Jan 19, 2026 if ordered today

Oil Catch Can, CCS, 7 oz., Oil Separator, Recirculating, Aluminum, Black, Round, Chevy, C8, Corvette, Gen V LT, Kit

Part Number: IRP-CCS-GM-C80

Not Yet Reviewed

Estimated Ship Date: Jan 22, 2026 if ordered today

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Estimated Ship Date: Jan 22, 2026 if ordered today

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