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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 133

Oil Catch Can, Breather Tank with Brackets, Round, Billet Aluminum, Polished, -16 AN Female AN, 2.250 in. Diameter, Each

Part Number: EDM-108-09

Not Yet Reviewed

Estimated Ship Date: May 7, 2026 if ordered today

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Estimated Ship Date: May 7, 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 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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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 )

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Oil Catch Cans, High-Flow, Baffled, Aluminum, Powdercoated Black, Bracket, Fittings, Hardware, Universal, Kit

Part Number: MIO-MMBCC-HF

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 29, 2026 if ordered today

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Estimated Ship Date: Apr 29, 2026 if ordered today

Oil Catch Cans, Parallel Port, Baffled, Aluminum, Powdercoated Black, 50 Micron, Bracket, Fittings, Hardware, Universal, Kit

Part Number: MIO-MMBCC-PPTWO

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 29, 2026 if ordered today

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Estimated Ship Date: Apr 29, 2026 if ordered today

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 ( 2 )

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Oil Catch Can, Round, 3 oz., Aluminum, Black Anodized, Chevy, GMC, Kit

Part Number: CSE-CC0001

5.0 out of 5 stars ( 8 )

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Oil Catch Can, Round, 7 oz. Capacity, Aluminum, Black, -10 AN O-ring Female AN O-ring, Chevrolet, 5.7L LS, Kit

Part Number: RDM-20-0260-FL

5.0 out of 5 stars ( 1 )

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PCV Air, Oil Separator Tank, Aluminum, Black Anodized, Universal, Each

Part Number: TFS-51400850

4.5 out of 5 stars ( 4 )

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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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Ultimate Catch Can Assembly, Billet Aluminum, Black, Recirculating Pressure Relief, Standard Capacity, Each

Part Number: SUM-300152

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

Part Number: RDM-20-0008-FL

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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

4.67 out of 5 stars ( 3 )

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PCV Air, Oil Separator Tank, Aluminum, Black Anodized, Universal, Kit

Part Number: TFS-K51400850

5.0 out of 5 stars ( 3 )

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Radium Engineering GM LS2/LS3/LS7 Engine Fluid Lock PCV Catch Can Kit

Part Number: RDM-20-0785-FL

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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: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Engine Oil Catch Can Kit

Part Number: CSE-CC0011

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Ultimate Catch Can Assembly, Billet Aluminum, Black, External Ventilated, High Capacity, Each

Part Number: SUM-300151

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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: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Oil BreatherTank, Dry Sump Breather, Round, Aluminum, Natural, Filtered Breather, Universal, Each

Part Number: AAF-ALL36108

4.67 out of 5 stars ( 9 )

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

Part Number: RDM-20-0786-FL

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today

Overflow Tank, 16 oz., Round, Aluminum, Natural, 3/8 in. NPT Inlet, Universal, Kit

Part Number: CTR-23-032

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Catch Can, Universal, 7 oz. Capacity, -6 AN Fittings, -6 AN Hose, Billet Aluminum, Black, Kit

Part Number: RDM-20-1806-FL

Not Yet Reviewed

Estimated Ship Date: May 5, 2026 if ordered today

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Estimated Ship Date: May 5, 2026 if ordered today