Availability
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 )
$47.99
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$160.99
Moroso thermostat spacers make fixing fitment issues a snap. The billet aluminum spacers raise the thermostat and add ports for water lines to the cylinder heads. The machined O-ring groove on the intake side ensures an excellent seal making installation easy and headache-free.
( 7 )
$48.99
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$49.99
Limiting the amount of coolant flow leaving the engine lets you control the amount of heat absorbed by the coolant itself. You can adjust the flow with one of these Moroso water outlet restrictor kits. They include include three round aluminum plates with 5/8 in., 3/4 in., and 1 in. I.D. holes. Simply mount the appropriate plate under the water outlet on the intake manifold. An easy and economical temperature control solution!
( 31 )
$19.99
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 )
$47.99
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$143.99
Moroso radiator hose fillers are spliced into the upper radiator hose to provide more complete cooling system filling. They are available for a variety of inlet/outlet hose sizes. The inline aluminum fillers take a standard size radiator cap, and the cap receptacle is welded to a cast flange.
( 18 )
$48.99
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$70.99
Moroso remote thermostat housings locate the filler neck at the highest point of cars with low mount radiators to bleed air. These housings can be flipped 180 degrees for either a left or right outlet location.
( 3 )
$109.99
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$113.99
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
Moroso water neck block-off plates can provide an ideal base to drill or weld your own fitting in place. They are made of aluminum and have two pre-drilled mounting holes to ensure a perfect fit to the intake manifold. The plates include a new gasket and will fit Chevrolet V8 engines.
( 4 )
$21.99
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
$35.99
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$55.99
Moroso remote thermostat housing mounting brackets are beautiful supports. Designed to mount their remote thermostat housings, they are manufactured from 6061 T-6 aluminum to be strong and good looking.
Not Yet Reviewed
$60.99
Moroso water outlet necks are one-piece billet aluminum designs. Most are clear anodized, but all include stainless steel mounting hardware. The filler necks also come with O-rings or gaskets as required. Select the model designed for your engine application.
Not Yet Reviewed
$48.99
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$64.99
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