Thermostat Housing
Every water-cooled engine uses a thermostat, which is usually found inside of a thermostat housing. This part seals the thermostat connection against an engine part (such as an intake manifold) to control water flow and is connected to a radiator hose.
When purchasing a thermostat housing replacement, it's important to confirm the year, make, and model of the vehicle, as well as the engine size. For custom cooling system and engine setups, be sure to match the housing to the intake manifold or other mounting point as well as choose the correct angle and radiator hose fitting size.
JEGS offers a generous thermostat housing car and truck selection from top vendors like Billet Specialties, CSR, Dorman Products, Mr. Gasket, JEGS, and others. Each housing is built from high quality materials and assembly to provide a leak-free and good looking connection for your vehicle's engine.
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March Performance BTH-401
March Performance BTH-401 Water Neck Thermostat Housing, 1979-2003 Small Block Chrysler 273/318/340/360, Billet, Straight, O-Ring, Clearcoat
$64.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
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$64.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
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JEGS 51125
JEGS
Aluminum Thermostat Housing for Small Block & Big Block Chevy, 75-degree Swivel Design [Satin Black]
$23.29
$20.99
SAVE $2.30
(1)
Ships on 05/27/25
Lowest Price Guarantee
JEGS 51126
JEGS
Aluminum Thermostat Housing for Small Block & Big Block Chevy, 90-degree Swivel Design [Satin Black]
$22.99
$20.69
SAVE $2.30
(6)
Ships on 05/27/25
Lowest Price Guarantee
$20.95
(3)
Estimated to ship direct from manufacturer on 05/27/25, pending manufacturer availability.
Lowest Price Guarantee
$20.95
(3)
Estimated to ship direct from manufacturer on 05/27/25, pending manufacturer availability.
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Speedmaster PCE191.1002
Speedmaster Thermostat Housing Water Neck 1968-1986 Small Block Chevy 350 [Chrome]
$12.00
(1)
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
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$12.00
(1)
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
JEGS 51113
JEGS
Aluminum Thermostat Housing for Small Block & Big Block Chevy, 90-degree Swivel Design [Polished]
$20.99
$17.09
SAVE $3.90
(16)
Ships on 05/27/25
Lowest Price Guarantee
JEGS 51112
JEGS
Aluminum Thermostat Housing for Small Block & Big Block Chevy, 75-degree Swivel Design [Polished]
$23.29
$20.99
SAVE $2.30
(22)
Ships on 05/27/25
Lowest Price Guarantee
March Performance BTH-412-08
March Performance BTH-412-08 Water Neck, Chrysler, Big Block 383-440, 90-Degree, Black
$134.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
$134.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
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March Performance BTH-211-05
March Performance BTH-211-05 Water Neck, Chevy LS Engine, Straight, One Piece, Billet, Polished
$49.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
$49.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
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$14.99
$14.24
SAVE $0.75
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
$14.99
$14.24
SAVE $0.75
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
March Performance BTH-213
March Performance BTH-213 Water Neck, Chevy LS Engine, 45-Degree, Two-Piece, Billet, Clearcoat
$134.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
$134.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
$107.99
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
$107.99
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
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$9.99
Estimated to ship direct from manufacturer on 06/04/25, pending manufacturer availability.
Lowest Price Guarantee
$9.99
Estimated to ship direct from manufacturer on 06/04/25, pending manufacturer availability.
Lowest Price Guarantee
March Performance BTH-204-05
March Performance BTH-204-05 Water Neck Thermostat Housing, Small/Big Block Chevy, Billet, 15-Degree, Two-Piece, O-Ring, Polished
$124.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
$124.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
Proform 66207K1
Proform Mopar Water Neck Kit Fits Mopar Slant 6 & V8"s 1959-78 with 160 Degree Thermostat
$34.67
Ships on 05/27/25
Lowest Price Guarantee
March Performance BTH-322
March Performance BTH-322 Water Neck Thermostat Housing, Small Block Ford 390/427/428, Billet, 90-Degree, Two-Piece, O-Ring, Clearcoat
$134.95
Ships on 05/27/25
Lowest Price Guarantee
$18.99
Estimated to ship direct from manufacturer on 05/29/25, pending manufacturer availability.
Lowest Price Guarantee
$18.99
Estimated to ship direct from manufacturer on 05/29/25, pending manufacturer availability.
Lowest Price Guarantee
March Performance BTH-412
March Performance BTH-412 Water Neck, Chrysler, Big Block 383-440, 90-Degree, Clearcoat
$134.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
$134.95
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
Concept ONE Pulley Systems A0370-82300M
Concept ONE Pulley Systems A0370-82300M Billet Thermostat Housing for GM LS3, 78 mm Spacing [Machined]
$139.00
Estimated to ship direct from manufacturer on 06/04/25, pending manufacturer availability.
Lowest Price Guarantee
$139.00
Estimated to ship direct from manufacturer on 06/04/25, pending manufacturer availability.
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$23.99
Estimated to ship direct from manufacturer on 06/04/25, pending manufacturer availability.
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$23.99
Estimated to ship direct from manufacturer on 06/04/25, pending manufacturer availability.
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$7.99
Estimated to ship direct from manufacturer on 06/04/25, pending manufacturer availability.
Lowest Price Guarantee
$7.99
Estimated to ship direct from manufacturer on 06/04/25, pending manufacturer availability.
Lowest Price Guarantee
$17.99
Estimated to ship direct from manufacturer on 07/25/25, pending manufacturer availability.
Lowest Price Guarantee
$17.99
Estimated to ship direct from manufacturer on 07/25/25, pending manufacturer availability.
Lowest Price Guarantee
$25.99
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
$25.99
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
$13.99
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee
$13.99
Estimated to ship direct from manufacturer on 05/28/25, pending manufacturer availability.
Lowest Price Guarantee