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Moroso 63421 - Filler Neck, Manifold Housing, Billet Aluminum

Since 1968, Moroso Performance Products is one of the worlds most respected suppliers of automotive equipment for racing and street performance applications!

Filler Neck Base
Adaptable Outlet Manifold Mounted
Use w/PN[63460/61/65/66] Or PN[63471]
H-2 5/16 in.
1 in. NPT And 0.5 in. Machined Ports
6061-T6 Billet Alum.
Availability: Will be special ordered for you.
Pricing: $90.99


• 1" NPT port is designed to be used with Nos. 63541, 63542, 63543, and 63544
• Black anodized billet aluminum housing stands 2-5/16" tall, which locates filler neck at highest point to bleed off air on cars with low-mount radiators
• Has to be mounted with conventional gaskets or Moroso No. 63469 Filler Neck O-Ring Gasket
• 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
• The unit can be flipped 180° for either right or left water hose outlet location
• Use with one of Moroso's Bolt-On Filler Necks NOs. 63460, 63461, 63465, 63466, or Block-Off Plate No. 63471

California Proposition 65

California Prop 65WARNING: Cancer & Reproductive Harm -


  • 63421
  • 63421
  • 084663634215
  • Moroso
  • Will be special ordered for you.
  • New

Shipping Information

  • Item Requires Shipping
  • 1.1 lbs.
  • W4.0000” x H5.0000” x L2.7500”

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California Residents: Prop 65

WARNING: Cancer and Reproductive Harm -