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.

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.

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Results 1 - 25 of 90

Moroso Manifold Filler Necks 63420

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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Summit Racing™ Billet Aluminum Water Necks SUM-371110-CL

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

Part Number: SUM-371110-CL

3.67 out of 5 stars ( 6 )

Estimated Ship Date: Today

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CSR Intake Manifold Water Filler Necks CSR 99133

Manifold Expansion Filler, 3 in. x 12AN, Each

Part Number: CSI-99133

Not Yet Reviewed

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Moroso Manifold Filler Necks 63424

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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CSR Intake Manifold Water Filler Necks CSR 913AN16BLK

Water Neck and Thermostat Housing, Radiator Cap Filler Neck Style, Swivel, with O-Ring Seal and Hardware, Billet Aluminum, Black Anodized, Chevy, Each

Part Number: CSI-913AN16BLK

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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CSR Intake Manifold Water Filler Necks CSR 99163

Water Neck, Billet Aluminum, Clear Anodized, 90 Degree, Universal, Each

Part Number: CSI-99163

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Moroso Manifold Filler Necks 63465

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 )

Estimated Ship Date: Today

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CSR Intake Manifold Water Filler Necks CSR 913C

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

Part Number: CSI-913C

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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CSR Intake Manifold Water Filler Necks CSR 99134

Water Neck, Billet Aluminum, Clear Anodized, 90 Degree, Universal, Each

Part Number: CSI-99134

Not Yet Reviewed

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Moroso Manifold Filler Necks 63423

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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Moroso Manifold Filler Necks 63421

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

Part Number: MOR-63421

Not Yet Reviewed

Estimated Ship Date: Today

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CSR Intake Manifold Water Filler Necks CSR 970C

Water Neck, Billet Aluminum, Clear Anodized, Straight Up, Chevy, Big/Small Block, Each

Part Number: CSI-970C

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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CVR Intake Manifold Water Filler Necks TSH3CL

Water Neck, Radiator Cap Filler Neck Style, Billet Aluminum, Clear Anodized, Chevy, Each

Part Number: CVS-TSH3CL

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

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Estimated Ship Date: Feb 2, 2026 if ordered today

PRW Water Necks 5292270

WATER NECK, MANIFOLD FILLER, CHEV, SB-BB, 90° Alum, Black

Part Number: PQX-5292270

Not Yet Reviewed

Estimated Ship Date: Jan 28, 2026 if ordered today

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Estimated Ship Date: Jan 28, 2026 if ordered today

Trick Flow® Clevor Water Crossover Kits TFS-51600600

Trick Flow® Clevor Water Crossover Kits TFS-51600600

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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CVR Thermostat Housings TSH7CL

Water Neck, Swivel, Billet Aluminum, Clear Anodized, O-ring, 90 degree, for 1.5 in. Hose, Ford, Small Block

Part Number: CVS-TSH7CL

3.36 out of 5 stars ( 11 )

Estimated Ship Date: Today

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CVR Thermostat Housings TSH5BK

Water Neck, 90 degree, 1.50 in. Hose Barb, Billet Aluminum, Black Anodized, Buick, Chevy, GMC, Pontiac, Small Block LS, Each

Part Number: CVS-TSH5BK

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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CSR Thermostat Housings CSR 9111C

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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CSR Thermostat Housings CSR 9112C

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

Part Number: CSI-9112C

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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JOES Racing Products Water Neck Outlets 36050

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

Part Number: JOE-36050

Not Yet Reviewed

Estimated Ship Date: Today

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CSR Thermostat Housings CSR 9114C

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

Part Number: CSI-9114C

4.0 out of 5 stars ( 4 )

Estimated Ship Date: Today

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Summit Racing™ Billet Aluminum Water Necks SUM-371111-BK

Water Neck, Billet Aluminum, Black, 90 Degree, -16 AN, Swivel, Chevy, Each

Part Number: SUM-371111-BK

Not Yet Reviewed

Estimated Ship Date: Today

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Summit Racing™ Billet Aluminum Water Necks SUM-371110-RE

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

Part Number: SUM-371110-RE

5.0 out of 5 stars ( 11 )

Estimated Ship Date: Today

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CVR Thermostat Housings TSH8CL

Thermostat Housing, 90 degree, Swivel, Billet Aluminum, Clear Anodized, O-ring Sealing Style, Chrysler, Each

Part Number: CVS-TSH8CL

5.0 out of 5 stars ( 8 )

Estimated Ship Date: Today

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Weiand Aluminum Water Necks 6244

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

Part Number: WND-6244

5.0 out of 5 stars ( 14 )

Estimated Ship Date: Today

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