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#91015310
Flathead Cylinder Head Stud Kit
- Studs have superior "pull down torque" and are a great upgrade from standard bolts
- Flathead decks are thin and their threads are easily stripped making head studs a necessity
- The combination of fine upper threads and hardened washers also prevents galling and ensures accurate torque readings
Starting from
$117.99
/set
In Stock
Quantity
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Product Summary
- Studs have superior "pull down torque" and are a great upgrade from standard bolts
- Flathead decks are thin and their threads are easily stripped making head studs a necessity
- The combination of fine upper threads and hardened washers also prevents galling and ensures accurate torque readings
- This kit works well with both aluminum and iron heads
- Never worry about blown head gaskets again!
Key Specs
| MFG. Part # | Select Year |
| Brand | Speedway Motors |
| Fastener Style | Stud |
| Thread Pitch | ="Block: 7/16"-14 UNC, Head: 7/16"-20 UNF" |
Need To Know
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Details
Performance engine builders know that head studs are superior to bolts, and this is especially the case on Flathead Ford and Mercury V8s. Flathead decks are thin and their threads are easily stripped. By installing studs, you avoid damaging the threads in the block through repeated use. The combination of the studs fine outer threads and hardened washers also prevents galling and ensures accurate torque readings, particularly on aluminum heads.
- Studs utilize superior "pull down torque"
- Properly fastens and torques both aluminum and iron heads
Item Details
1939-1948 or 1949-1953
Application
- Part number 91015310-39 for 1939-1948 Flathead V8s
- Part Number 91015310-49 for 1949-1953 Flathead V8s
Charts
910-15310 Instructions (PDF)
Guides & Documents
Specifications
Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | Select Year to see |
| Brand | Speedway Motors |
| Fastener Style | Stud |
| Thread Pitch | ="Block: 7/16"-14 UNC, Head: 7/16"-20 UNF" |
| GENERAL | |
| Sold in Quantity | Set |
| Cut to Fit | Yes |
| Finish | Zinc |
| Material Type | Steel |
| Notes | 39-48 set (48 each 3.25 inch studs) 49-53 set (28 each 3.25 inch , 20 3.00 inch studs) |
Ratings & Reviews
4.5
33 Reviews
The product, a stud kit, enjoys a high satisfaction rate, with customers praising its usability, quality, and practicality. Successfully used in various engine types such as the 1940 59A Flathead and 1950 Ford V-8, it's favorably compared to bolts for the convenience it provides during installation. Customers who've shopped with us for over 25 years continue to find these stud kits high in quality and fitment, attesting to their durability and material quality. Some users even claim it to be essential for aftermarket cylinder head installation. Despite a couple of complaints about disappointments in stud length and finish, overall, the stud kit is touted as a cost-effective, ideal replacement for original bolts with superior performance and reliability.
Ratings & Reviews
4.5
33 Reviews
The product, a stud kit, enjoys a high satisfaction rate, with customers praising its usability, quality, and practicality. Successfully used in various engine types such as the 1940 59A Flathead and 1950 Ford V-8, it's favorably compared to bolts for the convenience it provides during installation. Customers who've shopped with us for over 25 years continue to find these stud kits high in quality and fitment, attesting to their durability and material quality. Some users even claim it to be essential for aftermarket cylinder head installation. Despite a couple of complaints about disappointments in stud length and finish, overall, the stud kit is touted as a cost-effective, ideal replacement for original bolts with superior performance and reliability.
4.5
33 reviews
5
24
4
6
3
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2
0
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2
Most Liked Positive Review
5.0
excellent product
great product easy to fit and arrived in quick time. use 2 nuts to lock on stud and then wind them into the block secure, worth using stub lock to hold them tight
Most Liked Negative Review
1.0
VERY upset!!!
I WASTED several hours installing these studs, only to find out many of the studs are TOO SHORT!!! The product description says they will work with both Edelbrock and Offy alum heads...however they do NOT work with Edelbrock 1116 (74 cc) heads. I spent too much time and MONEY on this build to have these hassles! Now I will probably destroy a $120 headgasket (which has been painted already) removing it. I sure hope Speedway will replace them free of charge...seeing how I've spent almost $3000 with them if not more by now.
Filter by Ratings
I would purchase again
5.0
11 months ago
TG
MPLS
Verified
good upgrade to OE product
Yes
4.0
a year ago
Chris
Switzerland
Verified
Works well!
Would Recommend
Would buy again
5.0
a year ago
Gav
Melbourne, Australia
Verified
Not used yet but looks great, the kit weights quite a bit.
Would Recommend
Would buy again and have
5.0
a year ago
Davey
Pa
Verified
Good price
Would Recommend
poorly machined threads
3.0
2 years ago
Wildmanbill
Amherst, OH
Verified
Tried 2 sets of these and both sets, 42 of the 48 studs were poorly machined to the point the nuts jambed almost instantly when trying to run the nuts on. Set them back and tried the Offenhouser stud kit, it was the same way, poor machining.
Would Not Recommend
Affordable
4.0
2 years ago
Lucky
Pa
Verified
Affordable head studs
Yes
5.0
3 years ago
67goingthing
Dix, IL
Verified
Nice set
Would Recommend
Perfect fit and looks so good.
5.0
3 years ago
JD's Hot Rods
Eagle Mountain UT
Verified
I used these on my 1940 59A Flat head and they are great.
Would Recommend
I buy from Speedway whenever possible.
5.0
3 years ago
Iceman
Odenville,AL
Verified
Have been buying from Speedway for over 25 years and never disappointed.
Would Recommend
I will buy again
5.0
4 years ago
Philip
ohio
Verified
Good part
Showing 10 of 33 reviews