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 31

Philadelphia Racing Products Thermostat Housings PRP-6423

Philadelphia Racing Products Thermostat Housings PRP-6423

Thermostat Housing, Aluminum, Blue Anodized, Swivel, 90 Degree, -12 AN Outlet, Chevy, Each

Part Number: PGP-PRP-6423

Not Yet Reviewed

Estimated Ship Date: Oct 10, 2025 if ordered today

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Estimated Ship Date: Oct 10, 2025 if ordered today

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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Philadelphia Racing Products Thermostat Housings PRP-6726

Thermostat Housing, Aluminum, Black Anodized, Swivel, 90 Degree, -16 AN Outlet, Chevy, Each

Part Number: PGP-PRP-6726

Not Yet Reviewed

Estimated Ship Date: Oct 9, 2025 if ordered today

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Estimated Ship Date: Oct 9, 2025 if ordered today

Philadelphia Racing Products Thermostat Housings PRP-6573

Thermostat Housing, Aluminum, Polished, Swivel, 90 Degree, -12 AN Outlet, Chevy, Each

Part Number: PGP-PRP-6573

Not Yet Reviewed

Estimated Ship Date: Oct 10, 2025 if ordered today

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Estimated Ship Date: Oct 10, 2025 if ordered today

Philadelphia Racing Products Thermostat Housings PRP-6273

Thermostat Housing, Aluminum, Red Anodized, Swivel, 90 Degree, -12 AN Outlet, Chevy, Each

Part Number: PGP-PRP-6273

Not Yet Reviewed

Estimated Ship Date: Oct 10, 2025 if ordered today

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Estimated Ship Date: Oct 10, 2025 if ordered today

Philadelphia Racing Products Thermostat Housings PRP-6123

Thermostat Housing, Aluminum, Clear Anodized, Swivel, 90 Degree, -12 AN Outlet, Chevy, Each

Part Number: PGP-PRP-6123

Not Yet Reviewed

Estimated Ship Date: Oct 13, 2025 if ordered today

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Estimated Ship Date: Oct 13, 2025 if ordered today

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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CSR Thermostat Housings CSR 911AN20C

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

Part Number: CSI-911AN20C

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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CSR Thermostat Housings CSR 911AN16C

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

Part Number: CSI-911AN16C

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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CSR Thermostat Housings CSR 912C

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

Part Number: CSI-912C

3.83 out of 5 stars ( 6 )

Estimated Ship Date: Today

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CSR Thermostat Housings CSR 9110AN16C

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

Part Number: CSI-9110AN16C

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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CSR Thermostat Housings CSR 911AN12BLK

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

Part Number: CSI-911AN12BLK

Not Yet Reviewed

Estimated Ship Date: Today

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CSR Thermostat Housings CSR 9110C

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

Part Number: CSI-9110C

3.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Philadelphia Racing Products Thermostat Housings PRP-6724

Thermostat Housing, 90 Degree, Swivel, -16 AN Outlet, Aluminum, Black Anodized, Chevy, Each

Part Number: PGP-PRP-6724

Not Yet Reviewed

Estimated Ship Date: Today

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CSR Thermostat Housings CSR 9110AN20C

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

Part Number: CSI-9110AN20C

Not Yet Reviewed

Estimated Ship Date: Today

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Philadelphia Racing Products Thermostat Housings PRP-6424

Thermostat Housing, 90 Degree, Swivel, -16 AN Outlet, Aluminum, Blue Anodized, Chevy, Each

Part Number: PGP-PRP-6424

Not Yet Reviewed

Estimated Ship Date: Oct 10, 2025 if ordered today

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Estimated Ship Date: Oct 10, 2025 if ordered today

Philadelphia Racing Products Thermostat Housings PRP-6124

Thermostat Houising, 90 Degree, Swivel, -16 AN Outlet, Aluminum, Clear Anodized, Chevy, Each

Part Number: PGP-PRP-6124

Not Yet Reviewed

Estimated Ship Date: Oct 9, 2025 if ordered today

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Estimated Ship Date: Oct 9, 2025 if ordered today

CSR Thermostat Housings CSR 9110AN20BLK

Water Neck, 90 degree, Swivel, Billet Aluminum, Black Anodized, -20 AN, Ford, Small Block Windsor, Each

Part Number: CSI-9110AN20BLK

Not Yet Reviewed

Estimated Ship Date: Today

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Canton Racing Billet Aluminum Water Necks 80-052

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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CSR Intake Manifold Water Filler Necks CSR 914C

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

Part Number: CSI-914C

4.6 out of 5 stars ( 10 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

Philadelphia Racing Products Thermostat Housings PRP-6727

Thermostat Housing, Aluminum, Black Anodized, 90 Degree, -16 AN Outlet, Ford, Each

Part Number: PGP-PRP-6727

Not Yet Reviewed

Estimated Ship Date: Oct 10, 2025 if ordered today

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Estimated Ship Date: Oct 10, 2025 if ordered today

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Moroso Billet Aluminum Filler Necks 63455

4.75 out of 5 stars ( 3 )

Estimated Ship Date: Today

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

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

Part Number: SUM-371111-CL

5.0 out of 5 stars ( 2 )

Estimated Ship Date: Today

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Estimated Ship Date: Today

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

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

Part Number: SUM-371111-BL

Not Yet Reviewed

Estimated Ship Date: Nov 10, 2025 if ordered today

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Estimated Ship Date: Nov 10, 2025 if ordered today

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