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Valve Cover Breathers

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Valve Cover Breathers

Blow-by gases can mix with oil vapors in your crankcase, contaminating your oil and creating sludge. Your positive crankcase ventilation (PCV) system gets those gases...

Blow-by gases can mix with oil vapors in your crankcase, contaminating your oil and creating sludge. Your positive crankcase ventilation (PCV) system gets those gases out, recirculating them for combustion. The system may need a source of fresh air, preferably free of dirt and debris—that’s where the valve cover breather comes in!

Top Brands


From plain Jane to shiny and show-ready, Summit Racing Equipment carries an amazing selection of valve cover breathers. Shop from manufacturers like K&N, Proform, Billet Specialties, Cal Custom, Spectre, Moroso, and many more.

Blow-by gases can mix with oil vapors in your crankcase, contaminating your oil and creating sludge. Your positive crankcase ventilation (PCV) system gets those gases out, recirculating them for combustion. The system may need a source of fresh air, preferably free of dirt and debris—that’s where the valve cover breather comes in!

Top Brands


From plain Jane to shiny and show-ready, Summit Racing Equipment carries an amazing selection of valve cover breathers. Shop from manufacturers like K&N, Proform, Billet Specialties, Cal Custom, Spectre, Moroso, and many more.

Individual Parts

Results 1 - 25 of 101

Valve Cover Breather, Crankcase Vent, Clamp-On, Round, Rubber Base, Chrome Top, K&N Logo, Base Tube 1.25 in. ID, Each

Part Number: KNN-62-1490

4.28 out of 5 stars ( 76 )

Estimated Ship Date: Today

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Breather, Clamp-On, Shielded, Round, Steel/Rubber, Chrome/Black, 1 1/2 in. Diameter, Each

Part Number: AAF-ALL36203

5.0 out of 5 stars ( 5 )

Estimated Ship Date: Today

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Valve Cover Breathers, Weld-In, Clamp-On, Round, Steel/Rubber, Chrome/Black, Moroso Logo, Pair

Part Number: MOR-68800

5.0 out of 5 stars ( 2 )

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Valve Cover Breather, Clamp-On, Round, Steel/Rubber, Chrome/Black, 1 3/8 in. Nipple, Moroso Logo, Each

Part Number: MOR-68815

5.0 out of 5 stars ( 4 )

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Valve Cover Breathers, Round, Clamp-on, Black Hard Plastic Base, Black Rubber Top, Plain Top Style, 1.000 in. Hole Size, Each

Part Number: SBF-26-1370JR

Not Yet Reviewed

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Valve Cover Breathers, Round, Clamp-on, Chrome Aluminum Base, Black Rubber Top, Plain Top Style, 1.500 in. Hole Size, Each

Part Number: SBF-26-0015JR

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Valve Cover Breather, Clamp-On, Round, Steel/Rubber, Chrome/Black, 1 3/8 in. Nipple, Moroso Logo, Each

Part Number: MOR-68811

5.0 out of 5 stars ( 2 )

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Valve Cover Breather, Crankcase Vent, Clamp-On, Round, Rubber Base, Rubber Top, K&N Logo, fits .750 in. Hole, Each

Part Number: KNN-62-1560

5.0 out of 5 stars ( 5 )

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Valve Cover Breathers, Push-In/Clamp-On, Round, with Moroso Logo, fits 1.22 in. Diameter Hole, Steel/Rubber, Chrome/Black, Pair

Part Number: MOR-68810

5.0 out of 5 stars ( 1 )

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Valve Cover Breathers, Round, Clamp-on, Black Hard Plastic Base, Black Rubber Top, Plain Top Style, 0.625 in. Hole Size, Each

Part Number: SBF-26-1340JR

5.0 out of 5 stars ( 1 )

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Breather, Clamp-On, Round, Steel/Rubber, Chrome/Black, 1 1/2 in. Diameter, Each

Part Number: AAF-ALL36202

5.0 out of 5 stars ( 4 )

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Valve Cover Breather, Clamp-On, Round, 1 in. Nipple, Moroso Logo, GM LS Engines, Each

Part Number: MOR-68839

5.0 out of 5 stars ( 1 )

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Valve Cover Breather, Clamp-On, Round, Steel/Rubber, Chrome/Black, 1 1/2 in. Nipple, Summit Racing™ Logo, Each

Part Number: SUM-G3407

5.0 out of 5 stars ( 3 )

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Valve Cover Breather, Clamp-On, Round, Steel/Rubber, Chrome/Black, 1 1/2 in. Nipple, Moroso Logo, Each

Part Number: MOR-68816

5.0 out of 5 stars ( 1 )

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Valve Cover Breather, Clamp-On, Round, Steel/Rubber, Chrome/Black, Moroso Logo, Each

Part Number: MOR-68791

5.0 out of 5 stars ( 1 )

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Valve Cover Breather, Clamp-On, Round, Steel/Rubber, Chrome/Black, 1 1/2 in. Nipple, Moroso Logo, Each

Part Number: MOR-68812

Not Yet Reviewed

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Valve Cover Breathers, Round, Clamp-on, Black Hard Plastic Base, Black Rubber Top, Plain Top Style, 0.500 in. Hole Size, Each

Part Number: SBF-26-1330JR

5.0 out of 5 stars ( 2 )

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Valve Cover Breathers, Round, Clamp-on, Black Rubber Top, Black Hard Plastic Base, 1.125 in. Height, 1.375 in. Diameter, 0.313 in. Hole Size, Each

Part Number: SBF-26-2470JR

Not Yet Reviewed

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Valve Cover Breathers, Round, Clamp-on, Black Hard Plastic Base, Black Rubber Top, Plain Top Style, 0.875 in. Hole Size, Each

Part Number: SBF-26-1165JR

Not Yet Reviewed

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Valve Cover Breathers, Round, Clamp-on, Black Hard Plastic Base, Black Rubber Top, Plain Top Style, 1.375 in. Hole Size, Each

Part Number: SBF-26-0114JR

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Valve Cover Breathers, Filtered, Clamp-on, Round, Steel, Chrome, Plain Top, 1.750 in. Hole Size, Each

Part Number: MOR-68865

Not Yet Reviewed

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Valve Cover Breathers, Round, Clamp-on, Black Hard Plastic Base, Chrome Aluminum Top, Plain Top Style, 2.500 in. Height, 1.500 in. Hole Size, Each

Part Number: SBF-26-1514

3.0 out of 5 stars ( 2 )

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Breather, Filtered, Clamp-On, Rubber, Black, 1 in. I.D., Each

Part Number: MOR-68792

Not Yet Reviewed

Estimated Ship Date: Feb 9, 2026 if ordered today

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Estimated Ship Date: Feb 9, 2026 if ordered today

CRANKCASE VENT FILTER: CLAMP-ON, FLANGE 1.75

Part Number: SBF-26-1515

Not Yet Reviewed

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