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Thermostat Housing and Water Necks

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Thermostat Housing and Water Necks

Thermostat housing, water neck, water outlet, coolant housing…they’re all names for the same thing. This component is where the upper radiator hose plugs...

Thermostat housing, water neck, water outlet, coolant housing…they’re all names for the same thing. This component is where the upper radiator hose plugs in, and it also contains your mechanical thermostat. Grab a stock replacement to replace a leaky or broken one, dress up your engine with a chrome or anodized finish, or use a 360° swiveling model for versatility on your custom cooling system.

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Our powerful search tools make it easy to find the right water neck from manufacturers like Meziere, Dorman, Mr. Gasket, Four Seasons, Trans-Dapt, ACDelco, and so many more.

Thermostat housing, water neck, water outlet, coolant housing…they’re all names for the same thing. This component is where the upper radiator hose plugs in, and it also contains your mechanical thermostat. Grab a stock replacement to replace a leaky or broken one, dress up your engine with a chrome or anodized finish, or use a 360° swiveling model for versatility on your custom cooling system.

Top Brands


Our powerful search tools make it easy to find the right water neck from manufacturers like Meziere, Dorman, Mr. Gasket, Four Seasons, Trans-Dapt, ACDelco, and so many more.

Individual Parts

Results 1 - 25 of 98

Water Neck, Cast Aluminum, Polished, O-Ring, 90-Degree, Chevy, Big/Small Block, Each

Part Number: SUM-371101

4.59 out of 5 stars ( 54 )

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Water Neck, Cast Aluminum, Black Powdercoated, O-Ring, 45-Degree, Chevy, Big/Small Block, Each

Part Number: SUM-371100B

4.06 out of 5 stars ( 18 )

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Water Neck, Thermostat Housing, Cast Aluminum, Polished, 60 Degree, Swivel, Chevrolet, LS, Each

Part Number: SUM-370998

3.92 out of 5 stars ( 12 )

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Water Neck, Cast Aluminum, Black Powdercoated, O-Ring, 90-Degree, Chevy, Big/Small Block, Each

Part Number: SUM-371101B

3.33 out of 5 stars ( 6 )

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Water Neck, O-Ring, Steel, Chrome, 15 Degree, Chevy, Big/Small Block, Each

Part Number: SUM-G3801-3

4.27 out of 5 stars ( 11 )

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Water Neck, Steel, Chrome Plated, Straight Up, Mopar, Small Block LA, Polysphere, Big Block B/RB/Hemi, Each

Part Number: SUM-377806

3.6 out of 5 stars ( 35 )

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Water Neck, Cast Aluminum, Polished, O-Ring, 75 Degree, Chevy, Big/Small Block, Each

Part Number: SUM-371101-15

2.6 out of 5 stars ( 5 )

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Water Neck, Thermostat Housing, Cast Aluminum, Black, 60 Degree, Swivel, Chevrolet, LS, Each

Part Number: SUM-370998B

1.0 out of 5 stars ( 2 )

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Water Neck, O-Ring, Steel, Chrome, 15 Degree, Chevy, Big/Small Block, Each

Part Number: SUM-G3801-2

4.0 out of 5 stars ( 14 )

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Water Neck, Billet Aluminum, Black Powdercoated, 90 Degree, Chevy, Big/Small Block, Each

Part Number: SME-2200-11

3.9 out of 5 stars ( 10 )

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Water Neck, Cast Metal, Chrome Plated, 45 Degree, Chevy, Big/Small Block, Each

Part Number: SUM-G3800

4.38 out of 5 stars ( 29 )

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Water Neck, Thermostat Housing, 90 Degree, Chrome, Ford Small Block, SBF, Each

Part Number: SUM-370980

2.5 out of 5 stars ( 8 )

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Water Neck, O-ring, Steel, Chrome, 45 degree, Ford, Small Block Windsor, Each

Part Number: SUM-G3805-1

5.0 out of 5 stars ( 1 )

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Water Neck, Billet Aluminum, Clear, 90 Degree, Swivel, Chevy, Each

Part Number: SUM-371110-CL

3.67 out of 5 stars ( 6 )

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Water Neck, Steel, Chrome Plated, 45 Degree, Oldsmobile, V8, Each

Part Number: SUM-376003

5.0 out of 5 stars ( 2 )

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Water Neck, Cast Steel, Zinc Alloy, Chrome Plated, Straight, Chevy, Big/Small Block, Each

Part Number: SUM-G3803

4.93 out of 5 stars ( 14 )

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Water Neck, Aluminum, Black Anodized, Straight Up, -16 AN Male Threads, Chevrolet, Each

Part Number: JOE-36050

Not Yet Reviewed

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Water Neck, Aluminum, Black/Natural, 90 Degree, Chevy, Big/Small Block, Kit

Part Number: CTR-80-006

5.0 out of 5 stars ( 2 )

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Water Neck, Cast Aluminum, Black Powdercoated, O-Ring, 15-Degree, Chevy, Big/Small Block, Each

Part Number: SUM-371102B

2.5 out of 5 stars ( 2 )

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THERMOSTAT HOUSING 1.250

Part Number: SUM-3701250

1.0 out of 5 stars ( 1 )

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Water Neck, Aluminum, Chrome Plated, Swivel, 60 Degree, Chevrolet, LS, Each

Part Number: SUM-370995

3.67 out of 5 stars ( 12 )

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Water Neck, Billet Aluminum, Red, 90 Degree, Swivel, Chevy, Each

Part Number: SUM-371110-RE

5.0 out of 5 stars ( 11 )

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Water Neck, Billet Aluminum, Polished, 90 Degree, Ford, Small Block, Each

Part Number: CTR-80-056

3.57 out of 5 stars ( 7 )

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Water Neck, Offset Adapter Style, Billet Aluminum, Black Powdercoated, Chevy, Each

Part Number: CHH-3300-001B

Not Yet Reviewed

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