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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 308

Water Neck, Billet Aluminum, Natural, -16 AN Male, Straight Up, Chevy, Big/Small Block, Each

Part Number: CTR-80-100

Not Yet Reviewed

Estimated Ship Date: Feb 10, 2026 if ordered today

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Estimated Ship Date: Feb 10, 2026 if ordered today

LSX-12AN FITTING WATER NECK AND WATER PUMP ADAPTER

Part Number: TSN-HC8939

Not Yet Reviewed

Estimated Ship Date: Mar 24, 2026 if ordered today

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Estimated Ship Date: Mar 24, 2026 if ordered today

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

Part Number: MOR-63424

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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

Part Number: CHH-3300-001B

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

Part Number: MOR-63420

4.0 out of 5 stars ( 9 )

Estimated Ship Date: Today

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Thermostat Housing Crossover, Aluminum, Ford, 351W, Cleveland Heads, Kit

Part Number: TFS-51600600

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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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 )

Estimated Ship Date: Today

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Water Neck, Billet Aluminum, Clear Anodized, Swivel, 90 Degree, Ford, 260-302/351W, Each

Part Number: CSI-9111C

3.6 out of 5 stars ( 10 )

Estimated Ship Date: Today

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

Part Number: JOE-36050

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Water Neck, Billet Aluminum, Black Anodized, Radiator Cap Filler, Chevy, Big/Small Block, Each

Part Number: MOR-63465

5.0 out of 5 stars ( 5 )

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Water Neck, Billet Aluminum, Polished, Straight Up, Ford, Country, Kit

Part Number: CTR-80-026

5.0 out of 5 stars ( 3 )

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Water Neck, LS Water Pump Adapter, Straight Up, Billet Aluminum, Clear Anodized, Chevy, Small Block LS, Kit

Part Number: EAR-LS0005ERL

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Water Neck, Billet Aluminum, Clear Anodized, Swivel, 90 Degree, Pontiac, 350-455, Each

Part Number: CSI-9114C

4.0 out of 5 stars ( 4 )

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Water Neck, Billet Aluminum, Clear Anodized, Swivel, 90 Degree, Ford, 429/460, Each

Part Number: CSI-9112C

3.75 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Water Neck, 90 Degree, Swivel, Billet Aluminum, Natural, Chevy, LS, Each

Part Number: CTR-80-052

3.86 out of 5 stars ( 7 )

Estimated Ship Date: Today

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Water Neck, Billet Aluminum, Clear Anodized, Swivel, 90 Degree, Chevy, Big/Small Block, Each

Part Number: CSI-911AN20C

4.0 out of 5 stars ( 4 )

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Water Neck, Billet Aluminum, Polished, Straight Up, Ford, Each

Part Number: CTR-80-036

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Feb 10, 2026 if ordered today

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Estimated Ship Date: Feb 10, 2026 if ordered today

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

Part Number: CTR-80-056

3.57 out of 5 stars ( 7 )

Estimated Ship Date: Today

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Water Neck, Billet Aluminum, Clear Anodized, Swivel, -20 AN, 90 Degree, Ford, 260-302/ 351W, Each

Part Number: CSI-9110AN20C

Not Yet Reviewed

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Water Neck, Aluminum, Black Anodized, Straight Up, -20 AN Male Threads, Chevrolet, Each

Part Number: JOE-36060

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Water Neck, Billet Aluminum, Clear Anodized, Swivel, 90 Degree, Chevy, Big/Small Block, Each

Part Number: CSI-911AN16C

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Water Neck, Billet Aluminum, Natural, Straight Up, -16 AN Male, Ford, Big Block 385 Series, Cleveland, Kit

Part Number: CTR-80-037

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Water Neck, Billet Aluminum, Natural, Straight Up, 1.50 in. Hose, Ford, Big Block 385 Series, Cleveland, Kit

Part Number: CTR-80-027

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Water Neck, Billet Aluminum, Black Anodized, Spacer, 2 5/16 in.Tall, Chevy, Big/Small Block, Each

Part Number: MOR-63421

Not Yet Reviewed

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

Part Number: MOR-63423

4.6 out of 5 stars ( 5 )

Estimated Ship Date: Today

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