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Billet Specialties thermostat housings not only look good, but they also get rid of leaky paper gaskets thanks to their O-ring seal design. You can choose the conventional vertical housing or the high-tech 360 degree swivel housing. They're available straight-up or with a 0, 15, or 45 degree angle and come complete with stainless hardware.
( 243 )
$62.95
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$113.95
On Sale
Mr. Gasket offers replacement water necks in a variety of styles, materials, finishes, sizes, and angles. Water necks help to hold the vehicle's thermostat in place as it opens and closes—to regulate the flow of coolant through your engine. The opening in the water neck created by the thermostat allows coolant to flow from the radiator back to the engine. Order the model recommended for your vehicle.
( 114 )
$55.29
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$74.19
Moroso offers manifold filler necks in a variety of styles, materials, and finishes—for applications from 1955 and up. These replacements locate the filler at the highest point to bleed off air on cars with low-mount radiators. The filler necks can be located on either the left or right side of the vehicle. They include 1/2 in. NPT fittings for the installation of a water temperature sending unit, and two 1/4 in. NPT fittings for return lines on popular aftermarket cylinder heads.
( 20 )
$62.99
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$100.99
Scott Drake swivel water necks are machined from billet aluminum. Their 2-piece design allows the neck to fully rotate to perfectly fit your particular application. These exclusive Scott Drake water necks were designed for classic car applications that require a 45 degree angle. They include mounting hardware and rubber O-ring seals to ensure a leak-proof installation.
( 9 )
$99.95
Install your sending units with Vintage Air water neck risers. These aluminum spacers solve the problem of hose clearance, port access, and not being able to use existing manifold outlets. The risers are available to fit vehicles in every decade from the 1950s to the new millennium. Connect pressure-side heater line or hose and the sending units in your classic ride with water neck risers from Vintage Air.
( 21 )
$53.99
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$56.99
These Summit Racing™ 360 degree swivel water necks are constructed from high-quality T6-6061 billet aluminum and feature a beautiful, bright-anodized, machined finish. The flange is sealed at the manifold with an O-ring, eliminating the gasket, and stainless steel hardware is included.
( 28 )
$88.99
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$94.99
Position your hose where you want it with CVR thermostat housings. These beautifully machined housings swivel 360 degrees for ease of installation. Crafted from T6-6061 billet aluminum, CVR thermostat housings are bright anodized in several finishes for a professional look under your hood. The flange is sealed at the manifold with an O-ring, eliminating the gasket, plus stainless steel hardware is included. You can count on high performance looks and operation with CVR thermostat housings.
( 67 )
$94.99
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$108.99
Allstar Performance billet water necks fit most Chevy V8s, accept most standard thermostats, and swivel a full 360 degrees to simplify connection of LH or RH radiator hoses to the engine. Available in several outlet sizes, each one features a black anodized finish to help protect against corrosion. Stainless steel hardware and an O-ring for sealing the base of the water neck to engine are included. Choose the size you need.
Not Yet Reviewed
$99.99
Redhorse Performance 4910 Series water neck assemblies offer solution upgrades for your coolant outlets. These thermostat housings, or "water necks" as they are also called, make an excellent option for replacing worn or damaged of the stock engine coolant water outlet—or for creating custom color combinations at a minimal cost. RHP's thermostat housing assemblies are precision-machined from aluminum and are available in several styles, with O-ring gaskets to eliminate leakage, and offered in choice of clear, or blue, black, or red anodized finishes. Order the model for your application.
( 4 )
$53.96
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$128.20
Mopar Replacement thermostats offer high-quality, along with an original equipment fit and function to keep your favorite Chrysler, Dodge, Plymouth, or Jeep rolling down any road you choose to travel. For a direct fit and reliable, safe operation, service your vehicle with genuine Mopar Replacement thermostats to maintain the "cooling" performance you've come to expect. Order the model designed for your specific application.
( 9 )
$55.99
These Moroso water neck bleeder kits allow you to remove air pockets from your cooling system. They include a filler neck housing with a 90 degree outlet for the upper radiator hose, an aluminum bleeder plate with a petcock valve, two mounting gaskets, and mounting hardware. The Moroso water neck bleeder kits can also be used with Moroso's expansion tanks for maximum cooling performance.
( 4 )
$85.99
AFCO Racing aluminum thermostat housings adapt to your upper hose position. They feature polished aluminum construction and allow for 360 degree rotation for perfect hose alignment. These housings use an O-ring for a quality seal to the intake, and bolts are included. Choose the water neck style angle that best suits your application.
( 34 )
$52.99
Moroso billet aluminum filler necks allow you to install a variety of bolt-on style filler necks or block-off plates, offering cooling system flexibility for both race and street applications. The base locates the filler neck at the highest point, to bleed off air on cars with low-mount radiators. They include a machined port for installing a water temperature sending unit, and two ports to plumb return lines on popular aftermarket heads. And, to give you versatile mounting options--these filler necks can be flipped 180 degrees for either a left or right water hose outlet location.
( 9 )
$54.99
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$104.99
Mishimoto thermostats are effective in noticeably lowering engine coolant temperatures. These thermostats are built with high-quality wax and are shipped with new rubber gaskets (where applicable) for a good, leak-free seal. They are then digitally calibrated for precise operation. Mishimoto thermostats open up at a slightly lower temperature than OEM or standard thermostats once your engine is fully warmed up. This allows the coolant to flow through the engine sooner, thus reducing and maintaining cooler engine temperatures. Whether you have a daily driver or a modified and upgraded turbo, Mishimoto thermostats will maintain optimal temperatures to efficiently cool your application.
( 73 )
$64.95
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$91.95
Meziere water necks are available in a wide range of styles, colors, finishes, and fitment options. These replacements offer factory-style performance and great looks under your hood. Matching outlets are sold separately.
( 19 )
$51.85
March Performance thermostat housings are available in several styles and finishes covering a wide range of vehicle engine applications. Each housing is CNC-machined from 6061 T-6 aluminum and available polished, black anodized, or clearcoated. Most styles include mounting hardware and an O-ring for a clean seal. The 1.5 in. radiator hose neck swivels inside of base for perfect routing. March Performance thermostat housings are compatible with OEM and numerous aftermarket thermostats. Choose the one designed for your application.
( 11 )
$54.99
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$66.99
JOES Racing Products water neck outlets are compact and lightweight. These aluminum units have a no. 16 or no. 20 fitting for your radiator hose, and the base has an O-ring for sealing to your intake manifold. JOES also offers a ported version designed with two 3/8 in. NPT ports for additional water lines.
( 1 )
$69.95
CSR thermostat housings are constructed from CNC-machined billet 6061-T6 aluminum, with a variety of anodized color options. These water necks are available for 1 1/4 in., 1 1/2 in., or -16 AN fitting hose connections. The flange is sealed at the manifold with an O-ring, eliminating the gasket. Stainless steel hardware is included. Order the housing designed for fitment with your vehicle and engine application.
( 33 )
$102.95
Motorcraft thermostats are constructed for strength and rigidity, with a mounting flange designed to properly fit and seat the thermostat in the housing. The streamlined Venturi nozzle gives you maximum coolant flow, and the stainless steel spring offers precise operating compression.
( 5 )
$57.99
Canton Racing billet aluminum water necks will not crack or break like conventional OEM water necks. They feature CNC-machined billet aluminum construction for ultimate durability. Canton Racing billet aluminum water necks are available with a standard 1 1/2 in. smooth hose connection or a -16 AN male threaded fitting connection. The water necks include stainless steel mounting hardware for the ultimate protection against corrosion.
( 38 )
$75.00
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$78.00
These Canton Racing water neck spacers are designed to move the thermostat and housing up 1 in. higher than the intake manifold. This increased thermostat height is helpful for cars that have radiators slightly higher than the intake manifold. They are manufactured from billet aluminum and have a clear anodized finish applied for protection. Canton Racing water neck spacers feature one 1/2 in. NPT and two 3/8 in. NPT female threaded ports to connect your hoses or lines.
( 9 )
$69.00
Made from investment cast aluminum for a smooth look, these Summit Racing™ water necks include two 1/4 in. NPT outlets, one 1/2 in. NPT outlet, and a 1/8 in. NPT overflow. They use a standard radiator cap, accept 1 1/2 in. radiator hose, and include gaskets and mounting hardware. They come in your choice of either a natural or black powdercoated finish.
( 22 )
$103.99
PRW water necks are available with a rubber O-ring or a standard paper gasket for a leak-free seal. They're made from cast or billet aluminum, straight or angled, with either a natural or polished finish. Order the model recommended for your engine application.
Not Yet Reviewed
$65.22
Hybrid Racing offers low temp thermostats for a variety of applications, including many Honda© and Acura© models from 1990 and up. The advantages of using a low-temperature thermostat in high performance or race environments are evident. Opening the thermostat's valve at a lower temperature allows coolant to flow more freely during low-load sections of the racetrack. This enables the radiator to effectively regulate the engine's temperature within the optimal range during high-load sections. If a cooling system is pushed to its limits at the racetrack and overheating becomes an issue, a low-temperature thermostat can often resolve this problem. It achieves this by allowing the radiator to perform more cooling at lower engine loads, thereby preventing or delaying overheating during high-engine loads. Overall, low-temperature thermostats provide improved engine cooling, prevent temperature hunting, offer durability, and allow for customizable cooling systems. These advantages make them a valuable component, especially in high performance applications where maintaining optimal temperatures is crucial for engine performance and longevity. Order the model recommended for your vehicle.
Not Yet Reviewed
$85.49
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$90.24
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