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Moroso Performance Parts
Moroso 63421
Moroso 63421 Filler Neck Billet Chevy Adapt 500x500
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Moroso 63421
Filler Neck Manifold Housing, 1" NPT

• Billet aluminum
• Black anodized finish
• 2-5/16" tall
• Can be flipped 180º
• Made in USA
Retail Price: $69.59
Our Price: $55.95
UPC 084663634215
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(US only. Excluding any oversize charges.)
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Performance Parts is a Moroso authorized performance retailer
Product Info Related Items
Filler Neck Manifold Housing, 1" NPT

• Billet aluminum
• Black anodized finish
• 2-5/16" tall
• Can be flipped 180º
• Made in USA

Moroso 63421 features a black anodized billet aluminum housing that stands 2-5/16" tall and locates filler neck at highest point to bleed off air on cars with low-mount radiators. Moroso 63421 has to be mounted with conventional gaskets or 63469 Filler Neck O-Ring Gasket. Moroso 63421 can be flipped 180º for either right or left water hose outlet location. Moroso 63421 includes a 1/2" NPT port for installing a water temperature sending unit and two 1/4" NPT ports to plumb return lines on popular aftermarket cylinder heads.


1" NPT port is designed to be used with 63541, 63542, 63543, and 63544
Shipping Weight/Dimensions:
Weight:1.00 lbs
Height:3.00 in.
Length:9.63 in.
Width:6.88 in.
Shipping from warehouses in the U.S. and Canada!
Performance Parts has over 20 warehouses in the U.S. and Canada so you can get your parts duty free! Call for availability.
Moroso 63544
$21.95
Moroso 63544 Electric Water Pump Hose Adapter
• Aluminum Adapters used with Moroso Electric Water Pumps to adapt popular hose sizes
Moroso 63543
$22.95
Moroso 63543 Electric Water Pump Hose Adapter
• Aluminum Adapters used with Moroso Electric Water Pumps to adapt popular hose sizes
Moroso 63542
$18.95
Moroso 63542 Electric Water Pump Hose Adapter
• Aluminum Adapters used with Moroso Electric Water Pumps to adapt popular hose sizes
Moroso 63541
$20.95
Moroso 63541 Electric Water Pump Hose Adapter
• Aluminum Adapters used with Moroso Electric Water Pumps to adapt popular hose sizes
Moroso 63471
$10.95
Moroso 63471 Water Neck Block-Off Plate
Fits Chevrolet V8s
Moroso 63466
$44.95
Moroso 63466 • Made from 6061-T6 billet aluminum
• Easily mounts to any Big Block or Small Block Chevy intake manifold, and can be used in all racing and streetperformance applications where a heavy-duty filler neck is required
• Includes screw-in 1/8" NPT hose fitting for expansion tanks, and accepts Moroso (see page 137) or standard-size radiator cap (not included)
• Can also be used as a heavy-duty replacement in our Filler Neck Kits Nos. 63420, 63470 and 63480
Moroso 63465
$27.95
Bolt-On Stamped Aluminum Filler Neck - Chevy

• Billet aluminum
• Black anodized finish
• 100% leak tested
• Made in USA
Moroso 63460
$31.95
Water Outlet Filler Neck - Chevy Small Block, Big Block, 90º V6 Intake Manifolds

• Billet aluminum
• Anodized black finish
• -16AN fitting
• Made in USA
Moroso 63461
$67.95
Moroso 63461 Bolt-on water neck
Fits most Chevrolet V8s
- Last Updated: 2014-10-21 12:41:35 -
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