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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.

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Radium Engineering Catch Can Kits for 1997-2004 CORVETTE - 20-0260-FL

Radium Engineering Catch Can Kits for 1997-2004 CORVETTE - 20-0260-FL

Radium Engineering Catch Can Kits for 1997-2004 CORVETTE - 20-0260-FL

Radium Engineering Catch Can Kit GM LS Engine Fluid Lock

Part Number: RDM-20-0260-FL

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Radium Engineering Catch Can Kits 20-0008-FL

Radium Engineering Catch Can Kits 20-0008-FL

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

Not Yet Reviewed

Estimated Ship Date: Today

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Radium Engineering Catch Can Kits 200772

Radium Engineering Catch Can Kits 200772

Radium Engineering Catch Can Kits 200772

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

Not Yet Reviewed

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Radium Engineering Universal Catch Cans 20-0219

Radium Engineering Universal Catch Cans 20-0219

Radium Engineering Universal Catch Cans 20-0219

Air Oil Separator - Universal Kit

Part Number: RDM-20-0219

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Universal Catch Cans 20-1806-FL

Radium Engineering Universal Catch Cans 20-1806-FL

Radium Engineering Universal Catch Cans 20-1806-FL

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: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Catch Can Kits for 2014-2019 FIESTA - 20-0378-FL

Radium Engineering Catch Can Kits for 2014-2019 FIESTA - 20-0378-FL

Radium Engineering Catch Can Kits for 2014-2019 FIESTA - 20-0378-FL

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

Part Number: RDM-20-0378-FL

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Universal Catch Cans 20-1808-FL

Radium Engineering Universal Catch Cans 20-1808-FL

Radium Engineering Universal Catch Cans 20-1808-FL

Catch Can, Universal, 7 oz. Capacity, -8 AN Fittings, -8 AN Hose, Billet Aluminum, Black, Kit

Part Number: RDM-20-1808-FL

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Catch Can Kits for 2017-2025 CIVIC - 20-0826-FL

Radium Engineering Catch Can Kits for 2017-2025 CIVIC - 20-0826-FL

Radium Engineering Catch Can Kits for 2017-2025 CIVIC - 20-0826-FL

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 27, 2026 if ordered today

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Estimated Ship Date: Jan 27, 2026 if ordered today

Radium Engineering Catch Can Kits 20-0233-FL

Radium Engineering Catch Can Kits 20-0233-FL

Radium Engineering Catch Can Kits 20-0233-FL

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 26, 2026 if ordered today

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Radium Engineering Catch Can Kits 20-0005-FL

Radium Engineering Catch Can Kits 20-0005-FL

Radium Engineering Catch Can Kits 20-0005-FL

Catch Can, Dual, 7 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, Pair

Part Number: RDM-20-0005-FL

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Universal Catch Cans 20-1810-FL

Radium Engineering Universal Catch Cans 20-1810-FL

Radium Engineering Universal Catch Cans 20-1810-FL

Catch Can, Universal, 7 oz. Capacity, -10 AN Fittings, -10 AN Hose, Billet Aluminum, Black, Kit

Part Number: RDM-20-1810-FL

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Catch Can Kits for 2005-2013 CORVETTE - 20-0787-FL

Radium Engineering Catch Can Kits for 2005-2013 CORVETTE - 20-0787-FL

Radium Engineering Catch Can Kits for 2005-2013 CORVETTE - 20-0787-FL

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 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Catch Can Kits for 2015-2020 WRX STI - 20-0607

Radium Engineering Catch Can Kits for 2015-2020 WRX STI - 20-0607

Radium Engineering Catch Can Kits for 2015-2020 WRX STI - 20-0607

Air Oil Separator-Return Kit 2015+ Subaru STi

Part Number: RDM-20-0607

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Catch Can Kits 20-0608-FL

Radium Engineering Catch Can Kits 20-0608-FL

Radium Engineering Catch Can Kits 20-0608-FL

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 27, 2026 if ordered today

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Estimated Ship Date: Jan 27, 2026 if ordered today

Radium Engineering Catch Can Kits for 2017-2020 86, 2013-2020 BRZ, 2013-2016 FR-S - 20-0903-FL

Radium Engineering Catch Can Kits for 2017-2020 86, 2013-2020 BRZ, 2013-2016 FR-S - 20-0903-FL

Radium Engineering Catch Can Kits for 2017-2020 86, 2013-2020 BRZ, 2013-2016 FR-S - 20-0903-FL

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 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Catch Can Kits for 2009-2015 CTS - 20-1564-FL

Radium Engineering Catch Can Kits for 2009-2015 CTS - 20-1564-FL

Radium Engineering Catch Can Kits for 2009-2015 CTS - 20-1564-FL

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 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Catch Can Kits for 1990-2005 MIATA - 20-0336-FL

Radium Engineering Catch Can Kits for 1990-2005 MIATA - 20-0336-FL

Radium Engineering Catch Can Kits for 1990-2005 MIATA - 20-0336-FL

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 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Catch Can Kits for 2015-2018 FOCUS - 20-0358-FL

Radium Engineering Catch Can Kits for 2015-2018 FOCUS - 20-0358-FL

Radium Engineering Catch Can Kits for 2015-2018 FOCUS - 20-0358-FL

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 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Universal Catch Cans 20-0819

Radium Engineering Universal Catch Cans 20-0819

Radium Engineering Universal Catch Cans 20-0819

Air Oil Separator, Universal, 20.3 oz. Capacity, -10 AN O-Ring, Billet Aluminum, Black, Kit

Part Number: RDM-20-0819

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Catch Can Kits for 2005-2013 CORVETTE - 20-0786-FL

Radium Engineering Catch Can Kits for 2005-2013 CORVETTE - 20-0786-FL

Radium Engineering Catch Can Kits for 2005-2013 CORVETTE - 20-0786-FL

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: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Catch Can Kits for 2022-2025 WRX - 20-0756-FL

Radium Engineering Catch Can Kits for 2022-2025 WRX - 20-0756-FL

Radium Engineering Catch Can Kits for 2022-2025 WRX - 20-0756-FL

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 27, 2026 if ordered today

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Estimated Ship Date: Jan 27, 2026 if ordered today

Radium Engineering Catch Can Kits for 2020-2021 GOLF, 2022-2025 GOLF R - 20-0887-FL

Radium Engineering Catch Can Kits for 2020-2021 GOLF, 2022-2025 GOLF R - 20-0887-FL

Radium Engineering Catch Can Kits for 2020-2021 GOLF, 2022-2025 GOLF R - 20-0887-FL

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 27, 2026 if ordered today

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Estimated Ship Date: Jan 27, 2026 if ordered today

Radium Engineering Catch Can Kits 20-0873-FL

Radium Engineering Catch Can Kits 20-0873-FL

Radium Engineering Catch Can Kits 20-0873-FL

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

Part Number: RDM-20-0873-FL

Not Yet Reviewed

Estimated Ship Date: Jan 27, 2026 if ordered today

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Estimated Ship Date: Jan 27, 2026 if ordered today

Radium Engineering Catch Can Kits for 2000-2005 S2000 - 20-0092-FL

Radium Engineering Catch Can Kits for 2000-2005 S2000 - 20-0092-FL

Radium Engineering Catch Can Kits for 2000-2005 S2000 - 20-0092-FL

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

Part Number: RDM-20-0092-FL

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Radium Engineering Catch Can Kits for 2013-2018 FOCUS - 20-0315-FL

Radium Engineering Catch Can Kits for 2013-2018 FOCUS - 20-0315-FL

Radium Engineering Catch Can Kits for 2013-2018 FOCUS - 20-0315-FL

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

Part Number: RDM-20-0315-FL

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

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