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Convenient Cooling System Filling: The thermostat housing intake manifold filler neck allows you to conveniently fill your cooling system at the intake manifold when your radiator is positioned lower than the intake, ensuring easy access and efficient coolant filling., Versatile Design for Double Pass Radiators: This filler neck can be flipped to accommodate both right or left side upper hoses, making it a perfect choice for double pass radiators or other configurations., Multiple Threaded Holes for Water Bypass and Sending Units: The back of the neck features two 1/4\" NPT and one 1/2\" NPT threaded holes, allowing you to install water bypass lines or temperature sending units as needed for your specific cooling setup., Compatible with Standard Radiator Caps: This intake manifold filler nec Speedway Chevy V8 Thermostat Housing Intake Manifold Filler Neck Sku # 5752200 Mfr. Part # 5752200 Condition New Brand Speedway Motors Sold Each Details
This neck allows you to fill your cooling system at the intake manifold if you radiator is lower than the intake. It can be flipped over for RH or LH upper hoses, and has two 1/4\" npt and one 1/2\" npt hole in the back for bypass lines or sending units. Fill cap plate has a 7/16\" pipe nipple welded into the overflow area.
Fits Small Block or Big Block Chevy V8.
Specs MFG. Part # 5752200 Overall Height 2.25" Assembled Height 3.50" Centerline of Holes 3.25" Material Type Aluminum Finish Natural Sold in Quantity Each Notes Has two 1/4" NPT ports and one 1/2" NPT port. 7/16" pipe nipple for overflow. Includes 3/8" mounting bolts, washers, and gaskets. Reviews Excellent product good craftsmanship Rated by Rob on April 07, 2026
Summary: Works perfect looks good too
Yes, I recommend this product.
Great product Rated by Bob on November 11, 2025
Summary: This worked perfectly to get my rad cap to be the highest point to get air out of the system.
Yes, I recommend this product.
YES Rated by SCOTTY on May 27, 2025
Summary: USE IT FOR A DOUBLE BY PASS RADIATOR
Yes, I recommend this product.
Yes Rated by William on February 24, 2025
Summary: Installed on the Tour boat was a great designe worked perfectly. Had a good angle so the coolant hose was not kinked
Yes, I recommend this product.
I'll definitely be purchasing another one. Rated by Adam on December 02, 2024
Summary: Great product, fit perfectly.
Yes, I recommend this product.
Related Items / Suggested Parts Russell 662061 Endura Finish Aluminum Pipe Plug-1/2 In NPT Russell 662041 Endura Finish Aluminum Pipe Plug 1/4 In. NPT Edelbrock 7260 Waterneck Gasket, SBC/BBC, 1-Piece Waternecks Moroso 63471 Block Off, Filler Neck Moroso 63420 Manifold Filler Neck Tech Support We\'re here to help before and after your purchase. If you have a question or need assistance with one of our products, please contact us through Messaging and a knowledgeable Speedway Motors team member will be happy to help. About Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.
