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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.
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.
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.
Showing In Stock Items. Show All 28 Items.
Water Necks and Thermostat Housings, Thermostat Housing (Black Finish)
Part Number: FIF-38302-4
Not Yet Reviewed
Estimated Ship Date: Mar 16, 2026 if ordered today
Estimated Ship Date: Mar 16, 2026 if ordered today
Water Neck, Billet Aluminum, Black Anodized, 75 Degree, Chevy, Big/Small Block, Each
Part Number: BSP-BLK90320
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Polished, 15 Degree, Chevy, Big Block, Small Block, Each
Part Number: BSP-90320
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Polished, Straight Up, Chrysler, Dodge, Plymouth, Big Block, Small Block, Each
Part Number: BSP-90820
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Polished, 90 Degree, Chevy, Big Block, Small Block, Each
Part Number: BSP-90220
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Thermostat Housing, Swivel, 90 Degree, Aluminum, Black Anodized, O-ring Sealing Style, Fits 1 1/2 in. Radiator Hose, Ford, Small Block Windsor, Each
Part Number: BSP-BLK90620
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Polished, 90 Degree, Ford, 260-302/351W, Each
Part Number: BSP-90620
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck and Thermostat Housing, Straight, Aluminum, Black Anodized, GM LS, Each
Part Number: BSP-BLK90134
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Black Anodized, 90 Degree, Chevy, Big/Small Block, Each
Part Number: BSP-BLK90220
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Polished, 45 Degree, Chevy, Big Block, Small Block, Each
Part Number: BSP-90420
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Polished, Straight Up, Chevy, Big Block, Small Block, Each
Part Number: BSP-90120
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Thermostat Housing, 75 Degree, Aluminum, Black Anodized, Chevy, LS, Each
Part Number: BSP-BLK90335
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Black Anodized, Straight Up, -16 AN Male Threads, Chevy, LS, Each
Part Number: BSP-BLK90900
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Aluminum, Black Anodized, O-ring, 15 Degree, Each
Part Number: BSP-BLK90334
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Thermostat Housing, Swivel, 75 Degree, Black, LT1, LT2, LT4, LT5, Gasket and Thermostat Not Included, Chevy, Each
Part Number: BSP-BLK90520
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Black Anodized, Straight Up, -20 AN Male Threads, Chevrolet, Small/Big Block, Each
Part Number: BSP-BLK90119
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
THERMOSTAT HOUSING, THRMST HSG SWVL 15 DEG LS 2010-UP POL
Part Number: BSP-90335
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Black Anodized, Straight Up, -20 AN Male Threads, Chevy, LS, Each
Part Number: BSP-BLK90920
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Natural, Straight Up, -16 AN Male Threads, Chevy, LS, Each
Part Number: BSP-90900
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Aluminum, O-ring, Polished, 15 Degree, Each
Part Number: BSP-90334
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Black Anodized, 45 Degree, Chevy, Big/Small Block, Each
Part Number: BSP-BLK90420
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Natural, Straight Up, -20 AN Male Threads, Chevy, LS, Each
Part Number: BSP-90920
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Thermostat Housing, Straight, Aluminum, Black Anodized, Chevy, LS, Each
Part Number: BSP-BLK90135
Not Yet Reviewed
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Billet Aluminum, Polished, 0 Degree, Ford, FE Engines, Each
Part Number: BSP-90730
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
Water Neck, Aluminum, O-ring, Polished, 0 Degree, Each
Part Number: BSP-90134
Estimated Ship Date: Tomorrow
Estimated Ship Date: Tomorrow
