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Vibrant Performance radiator filler necks feature 6061 aluminum construction. They weld-on, include hose barb fitting, and are offered in two sizes. Mate them with their matching caps (sold separately) for the proper sealing.
Not Yet Reviewed
$30.79
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$33.50
Mishimoto aluminum coolant fill necks are CNC-machined and ready to be welded for use with your custom project! Offered in two sizes, these high performance fill necks include a screw-in nipple for overflow and are compatible with their high-pressure radiator caps. Customize your fabricated aluminum radiator with Mishimoto aluminum coolant fill necks.
( 13 )
$22.95
Summit Racing™ billet weld-on fill necks are ideal for use wherever a heavy-duty, custom application filler neck is required. They feature 6061 T-6 aluminum construction for durability in racing or street applications. These fill necks include 1/8 in. NPT to 3/8 in. barbed fittings for the plumbing of an expansion tank.
Not Yet Reviewed
$11.99
Canton Racing billet weld-on fill necks are ideal for use wherever a heavy-duty, custom application filler neck is required. They feature 6061-T6 billet aluminum construction for durability in racing or street applications. These fill necks include 1/8 in. NPT to 3/8 in. barbed fittings for the plumbing of an expansion tank.
( 7 )
$28.00
Some essential parts are just prone to wearing out due to what they're exposed to. Howe radiator filler necks help keep you from blowing a hole in your budget with an expensive radiator replacement. These universal billet aluminum necks are available in weld-on and weld-in versions to fit your specific application. Save your wallet and your radiator with a Howe radiator filler neck. Order the size designed to fit your specific model.
( 2 )
$13.99
On Sale
Fluidyne weld-on fill necks are ideal when you want a high performance piece for your radiator or surge tank. Available in a standard and mini size, they feature aluminum construction for durability in racing, street, or custom applications.
( 2 )
$23.00
$20.70
Build your own expansion tank, modify a radiator, or solve a myriad of other cooling system problems with Meziere radiator cap receivers. These weld-on aluminum filler necks come fully machined with Meziere's unique pressure ramp, precision sealing surfaces, and are ready to install.
Not Yet Reviewed
$32.87
Want to keep your high performance engine running prime? Moroso radiator filler necks are suitable for any competition or high performance street application. These radiator filler necks are offered in either billet aluminum or stamped aluminum to suit your needs, and are designed to accept a standard size radiator cap. (Not included)
Not Yet Reviewed
$32.99
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$51.99
Canton Racing extended fill necks raise the water fill point 6 in. above the manifold, which is ideal for bleeding off air within the cooling system. They feature Canton Racing's 6061-T6 billet aluminum construction for light weight and durability in racing environments. The fill tube is angled at 45 degrees to provide clearance for large air filters, scoops, etc. They include a 1/8 in. NPT to 3/8 in. barbed fitting for plumbing an expansion tank.
( 3 )
$82.00
The flange on Canton Racing's universal replacement filler necks accepts a standard radiator cap and fits Chevy intakes. They can also be used as replacement tops for Canton Racing water necks.
( 5 )
$40.00
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$45.00
DeWitts offers a wide range of engine cooling system components, including these universal radiator filler necks. Machined from billet aluminum with a standard size neck, they weld in easily to facilitate refilling your coolant reservoir.
Not Yet Reviewed
$39.99
JOES Racing Products radiator filler necks are high-quality filler necks machined from billet aluminum. JOES Racing Products radiator filler necks make the perfect choice for any fabricators building their own tanks or radiators.
Not Yet Reviewed
$25.95
The components you need to keep your ride cool and running its best! Dorman radiator filler necks are designed as OE replacements for your specific application, so you can be assured of quality and a perfect fit! Dorman radiator filler necks are offered for a variety of vehicles. You can count on Dorman for the replacement parts that you need for your cooling system.
( 3 )
$15.99
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$32.99
Continental coolant filler necks are designed to transfer glycol-based coolants to and from the radiator, as well as through other components in your vehicle's coolant system. They're made from quality material to be durable enough to withstand the extreme changes in temperature that frequently can cause them to leak. Continental coolant filler necks will provide leak-free performance, a consistent flow of coolant, and a lesser chance of overheating.
Not Yet Reviewed
$16.99
Proform remote overflow billet aluminum radiator fill necks are designed to facilitate efficient coolant flow, help maintain optimal engine temperature and provides a secure and long-lasting connection point for coolant management. The radiator neck is specifically designed to be recessed into the tank, allowing the overflow tube to travel inside the tank and exit through a remotely mounted barb. This U.S.-patented design offers a slick solution for concealing the unsightly radiator overflow tube, giving your setup a sleek and clean appearance. The kit includes a billet aluminum filler neck, an unbent 18 in. tube, and a billet barb. For those building custom systems, a weld-on billet aluminum filler neck can be a valuable addition, allowing for a more secure and leak-free installation.
Not Yet Reviewed
$86.99
AFCO Racing offers a wide range of replacement parts for nearly every facet of your vehicle—including billet aluminum weld-on radiator filler necks. These high-quality components will weld to any aluminum radiator. A 1/8 in. NPT removeable barb is included. Maintain your cooling system with factory-style parts from AFCO.
Not Yet Reviewed
$40.99
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