Moroso 63420 Filler Neck Housing w/ Cap Provision SBC BBC


  • Locates filler neck at highest point on cars with low-mount radiators to bleed off air
  • Unit can be flipped 180° for either right or left outlet location
  • Includes 1/2″ NPT fitting for installation water temperature sending unit and two 1/4″ NPT fittings for return lines on popular aftermarket cylinder heads
  • Made of 356-T6 cast aluminum; 3-1/4″
  • Includes gaskets, bolts, and washers, and standards size radiator cap filler neck
SKU: MOR63420 Category:

Filler Neck Manifold Housing, Chevrolet V8 & 90° V6

Weight 1.665 lbs
Dimensions 8.7 × 14.2 × 2.5 in



Manufacturer Part Number


Filler Neck Manifold Housing, Chevrolet V8 & 90ᄚ V6

Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to