Availability
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.
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.
Showing In Stock Items. Show All 123 Items.
Water Neck, Aluminum, Black Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Chevy, Small/Big Block, Each
Part Number: HSE-4910-350-242
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Black Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Ford, Small Block, Each
Part Number: HSE-4910-302-242
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Clear Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, With Filler Neck for Radiator Cap, Chevy, Small/Big Block, Each
Part Number: HSE-4910-383-245
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Clear Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Ford, Small Block, Each
Part Number: HSE-4910-302-245
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Clear Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Chevy, Small/Big Block, Each
Part Number: HSE-4910-350-245
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Black Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, With Filler Neck for Radiator Cap, Chevy, Small/Big Block, Each
Part Number: HSE-4910-383-242
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Necks and Thermostat Housings, With Auxillary Port, Aluminum, Natural, Dodge, Ram, 5.9L, 6.7L, Each
Part Number: FLE-S0449
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Black Anodized, O-Ring, Straight, 1.500 in. Outlet, Chevy, LS1/LS2/LS6, Each
Part Number: HSE-4910-347-242
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Black Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Ford, 426/460, Each
Part Number: HSE-4910-460-242
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Necks and Thermostat Housings, Allstar Performance Aluminum Water Necks, 45 degree, Swivel, Aluminum, O-ring, Each
Part Number: AAF-ALL30271
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Black Anodized, O-Ring, 75 Degree, 1.250 in. Outlet, Chevy, Small/Big Block, Each
Part Number: HSE-4910-350-202
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Blue Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Ford, 426/460, Each
Part Number: HSE-4910-460-241
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Necks and Thermostat Housings, Aluminum, Natural, Ford, Super Duty, Each
Part Number: FLE-S0574
Not Yet Reviewed
Estimated Ship Date: Jan 19, 2026 if ordered today
Estimated Ship Date: Jan 19, 2026 if ordered today
Water Neck, Billet Aluminum, 90 Degree, Swivel, -20 AN, Chevy, Each
Part Number: PFF-10-2120
Not Yet Reviewed
Estimated Ship Date: Dec 29, 2025 if ordered today
Estimated Ship Date: Dec 29, 2025 if ordered today
Water Neck, Aluminum, Blue Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Chevy, Small/Big Block, Each
Part Number: HSE-4910-350-241
Not Yet Reviewed
Estimated Ship Date: Dec 26, 2025 if ordered today
Estimated Ship Date: Dec 26, 2025 if ordered today
Need It Sooner? We recommend these similar substitute parts:
Water Neck, Aluminum, Red Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Ford, 426/460, Each
Part Number: HSE-4910-460-243
Not Yet Reviewed
Estimated Ship Date: Dec 26, 2025 if ordered today
Estimated Ship Date: Dec 26, 2025 if ordered today
Need It Sooner? We recommend these similar substitute parts:
Water Neck, Billet Aluminum, 90 Degree, Swivel, -16 AN, Chevy, Each
Part Number: PFF-10-2116
Not Yet Reviewed
Estimated Ship Date: Dec 26, 2025 if ordered today
Estimated Ship Date: Dec 26, 2025 if ordered today
Water Neck, Aluminum, Clear Anodized, O-Ring, Straight, 1.500 in. Outlet, Chevy, LS1/LS2/LS6, Each
Part Number: HSE-4910-347-245
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Blue Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Ford, Small Block, Each
Part Number: HSE-4910-302-241
Estimated Ship Date: Dec 26, 2025 if ordered today
Estimated Ship Date: Dec 26, 2025 if ordered today
Water Neck, Aluminum, Blue Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, With Filler Neck for Radiator Cap, Chevy, Small/Big Block, Each
Part Number: HSE-4910-383-241
Not Yet Reviewed
Estimated Ship Date: Dec 26, 2025 if ordered today
Estimated Ship Date: Dec 26, 2025 if ordered today
Need It Sooner? We recommend these similar substitute parts:
Water Neck, Aluminum, Black Anodized, O-Ring, 75 Degree, 1.250 in. Outlet, Ford, Small Block, Each
Part Number: HSE-4910-302-202
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Red Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Chevy, Small/Big Block, Each
Part Number: HSE-4910-350-243
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Neck, Aluminum, Black Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Dodge, Magnum Engines, Each
Part Number: HSE-4910-440-242
Not Yet Reviewed
Estimated Ship Date: Today
Estimated Ship Date: Today
Water Necks and Thermostat Housings, With Auxillary Port, Aluminum, Natural, Ram, 6.7L, Each
Part Number: FLE-FPE-CUMMTH19
Not Yet Reviewed
Estimated Ship Date: Jan 19, 2026 if ordered today
Estimated Ship Date: Jan 19, 2026 if ordered today
Water Neck, Aluminum, Clear Anodized, O-Ring, 75 Degree, 1.250 in. Outlet, Ford, Small Block, Each
Part Number: HSE-4910-302-205
Not Yet Reviewed
Estimated Ship Date: Dec 26, 2025 if ordered today
Estimated Ship Date: Dec 26, 2025 if ordered today
Modal Header
Call To Order
This is a custom order part. You can order this part by Contacting Us.
Truck / SUV
Jeep®
Restoration
Stock Replacement
Late Model Muscle
Tools
Gifts, Clothing, & More
Circle Track
Street Rod
Powersports
Paint & Body
Marine
Jr Dragster
