Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Speedway Manifold Filler Neck

Specs
Centerline of Holes:
3.23
Material Type:
Aluminum
Overall Height:
2.28
Sold in Quantity:
Each
Finish:
Natural
Assembled Height:
3.50
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.
Speedway Manifold Filler Neck
Product Video
Speedway Manifold Filler Neck

Click image to enlarge

Watch the video below to learn more about Speedway Motors radiators.

Details

Reviews

Q & A

What's in the Box

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.

Customer Reviews

Rated 3.5 out of 5 by 10 reviewers.
RATING BREAKDOWN
10 reviews
5 Stars
4
4 Stars
3
3 Stars
0
2 Stars
0
1 Star
3
RECOMMEND THIS PRODUCT:

studeynut
Verified Purchaser
Twin Falls, Idaho
Product Rating

Well made

October 29, 2014
Worked great to modify to fit on my 67 Datsun 1600 Roadster, much cheaper than the $400 for an original piece. Had plenty of material to redrill to fit the Datsun.
Yes, I recommend this product.
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WaterDodger
Canton, GA, USA
Product Rating

LEAKS

September 14, 2014
Will not seal around the cap. We tried numerous types from a stock gm to a high pressure cap. Regardless of our efforts the neck continued to leak. After the problem I read through other reviews and noticed that several people have had the same issue. We have always purchased from speedway and will continue to do so.
No, I would not recommend this product.
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421camaro
Verified Purchaser
New Hampshire
Product Rating

Great customer support

September 11, 2014
This place is awesome,great prices,great products and the best customer support out there.
No, I would not recommend this product.
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00MODracer
Verified Purchaser
Shreveport, LA, USA
Product Rating

Not good at all

June 24, 2014
Service and delivery good as always from speedway but product sucked would not seal off on top even after getting cap flat the top is made to thin will not seal off with gasket or silicon
Cons:
  • top to thin
No, I would not recommend this product.
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millertime
Verified Purchaser
spokane,wa
Product Rating

water fill neck

June 21, 2012
Nice product that works well
Pros:
  • Versatile
  • Lightweight
  • Durable
  • Easy To Use
Yes, I recommend this product.
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Default
Product Rating

Not good at all.......

June 15, 2013
Definitely not a good product had to purchase 30 dollars worth of fitting that did not come with it and it leaks like crazy! Don't recommend at all..
No, I would not recommend this product.
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racingtlc
Verified Purchaser
Calhoun Ky
Product Rating

This part looks an fit as good as any ot

February 09, 2015
Fit,looks,an works as good as a higher price brand,very happy!!
Yes, I recommend this product.
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buddy24
indiana
Product Rating

same high quality as the ones that cost

September 08, 2013
bought this item over the moroso because of the great price. i have the moroso on my other dragster and this is as good as it is. anyone having problems with this item is simply having issues because either they are tightening the bolts way too tight on this item or their intake manifold surface is corroded or not flat. and dont forget to use some kind of thread sealant on whatever fittings you use in the back 3 ports. thanks speedway for another great part!
Pros:
  • everything is a pro
Cons:
  • nothing is a con
Yes, I recommend this product.
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Taylor937
Verified Purchaser
Product Rating

great Product..

April 11, 2015
Great product. Shipped and received quickly. Exactly what I was wanting!!
Yes, I recommend this product.
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Redline j
Verified Purchaser
Verified Reviewer
Dallas ga
Product Rating

Works great

May 17, 2015
Simple bolt on works as described
Yes, I recommend this product.
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Page 1 of 1
5752200

Product Q&A

3 questions : 4 answers

1 answers

What Cap dose this take.? I'm planing on replacing the filler neck I now have,I don't know who made the one I have but I'm using one of these,or at lest one that looks excatly like that in photo here, I got from a buddy some years back. When I first put it on my t-bucket,the cap would not seal,there is no bends at all or scraches in the top were cap fits on,so tryed 4 other caps with the same no seal happening. At that point I found out the cap neck is too deep to seal reg caps. What I'm asking is this one made for reg size caps or some oddball like this old one? And have you herd about these old ones before cap size wise? I've always got great stuff from you,but this was not from you,but looks the very same,so before buying one to replace it,I need to know. Thanks

TheBat4
Miami, FL, USA
March 19, 2014

What Cap dose this take.? I'm planing on replacing the filler neck I now have,I don't know who made the one I have but I'm using one of these,or at lest one that looks excatly like that in photo here, I got from a buddy some years back. When I first put it on my t-bucket,the cap would not seal,there is no bends at all or scraches in the top were cap fits on,so tryed 4 other caps with the same no seal happening. At that point I found out the cap neck is too deep to seal reg caps. What I'm asking is this one made for reg size caps or some oddball like this old one? And have you herd about these old ones before cap size wise? I've always got great stuff from you,but this was not from you,but looks the very same,so before buying one to replace it,I need to know. Thanks

Answers

March 19, 2014
EricM
You may want to try a radiator cap such as 91015706 (Stant 10372.) We have found it to work better with filler necks that are a little extra deep. At times we will come across a filler neck that is deeper than typical. It doesn't seem to be limited to this type of filler but more often than not they are the stamped style. The billet necks seem to be more consistent.
2 answers

What material is this made of?

Billy Bob
Auburn, IN
August 06, 2011

What material is this made of?

Answers

August 11, 2011
torQ!
The body is aluminum, the top section is stamped steel.
August 08, 2011
QC
This is made from aluminum.
1 answers

I just ordered one of these from Speedway,...Does this unit accept the 1.5" I.D.radiator hose ??,...it doesn't state in your specs exactly what hose diameter fits this unit.

Cheyenne
Southwestern Ontario, Canada
May 17, 2015

I just ordered one of these from Speedway,...Does this unit accept the 1.5" I.D.radiator hose ??,...it doesn't state in your specs exactly what hose diameter fits this unit.

Answers

May 18, 2015
Eric
Expert
Yes this is for a 1 1/2" radiator hose.
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