Item # 63423• Manifold-mounted filler neck base is identical to the one included in Moroso Kit No. 63420 without the filler neck or mounting hardware
• Allows you to install a variety of bolt-on style filler necks (radiator cap or -AN style) or block-off plates, offering cooling system flexibility, for both race and street applications
• 356-T6 cast-aluminum base stands 2-5/16" tall, which locates filler neck at highest point to bleed off air on cars with low-mount radiators
• Includes a 1/2" N.P.T. machined port for installing a water temperature sending unit, and two 1/4" NPT machined 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
Item # 63420• Chevy V8 & 90° V6 Filler Neck Manifold Housing
• 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 installing water temp sending unit & 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
Item # 30372• Fits most Chevy V8
• Accepts most standard thermostats and swivel a full 360 degree to simplify connection of LH or RH radiator hoses to engine
• Black anodized finish helps protect against corrosion
• Stainless steel hardware and an o-ring for sealing the base of the water neck to engine included
Item # 38400• SBC and 90 Chevy V6, and Small Block Chrysler with single plane manifold, set of 12 3/8" -16 x 1-1/8"
• 3/8" diameter, 12-point head intake manifold bolts for use with aftermarket intake manifolds designed with extremely tight fastener clearances
• Kits are manufactured of Grade 8 steel with gold iridite finish and come complete with close-tolerance washers
Item # 38410• Big Block Chevy Intake Manifold Bolts - Set of 16
• 3/8" -16 x 1-1/4" 12-point head intake manifold bolts for use with aftermarket intake manifolds
• Designed with extremely tight fastener clearances
• Manufactured of Grade 8 steel with gold iridite finish
• Come complete with close-tolerance washers
Item # 64922• Throttle Return Spring Kit
• 18° Small Block Chevy Cylinder Heads
• Manifold Mount
• 5-7/16" Tall
• Provides positive throttle return required by several sanctioning bodies
• Each kit fits Holley® 2 or 4 bbl. single carb applications
• Includes one set of return springs
Item # 64923• Throttle Return Spring Kit
• Holley® 4500 and King Demon
• Carb Mount
• Clears most air cleaner combinations and can be used with dual carbs
• Chrome plated Steel
• Kit includes heavy and light sets of stainless steel return springs, all mounting hardware, and complete installation instructions
Item # 64925• Throttle Return Spring Kit
• Small Block Chevy and 90° V6 Chevy
• Manifold Mount
• 1-13/16" Tall
• Clears most air cleaner combinations and can be used with dual carbs
• Chrome plated Steel
• Kit includes heavy and light sets of stainless steel return springs, all mounting hardware, and complete installation instructions
Item # 64927• Throttle Return Spring Kit
• 2300/4100 Holley® Series, Road, Speed, Race Demon Series Carb Mounts
• The answer to your throttle return spring linkage problems if you're running a 2300/2305 series two-barrel or 4150/4160 series 4-barrel Holley® or Road, Speed, Race Demon™ carburetor
• Designed and built rugged enough for competition, yet its polished chrome finish is suitable for the finest show car
• Includes one set of heavy and one set of light springs
Item # 64929• Throttle Return Springs
• Pack of two
• Stainless steel springs can be used as spares or replacements for Moroso Throttle Return Spring Kit Nos. 64925, 64926 and 64928