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Top Street Performance

Pro Series 39-48 Ford Flathead Offenhauser Cylinder Head Stud Kit

Pro Series 39-48 Ford Flathead Offenhauser Cylinder Head Stud Kit

SKU: SKU: 660-81983

Regular price $225.50
Sale price $225.50 Regular price $256.25
Shipping calculated at checkout.

In stock

Top Street Performance (TSP) is committed to providing high-quality performance parts while complying with emissions regulations. This product is designed for use on vehicles that comply with federal emissions regulations. It is the customer’s responsibility to verify that this part is legal for use in their state or local jurisdiction. Check with your local emissions authority before purchasing.

Product Details

Features

  • Fits 1939-1948 Ford Flathead V8 Engines: Designed for compatible Offenhauser cylinder head applications.
  • 190,000 PSI Tensile Strength: Heat-treated 35 chromoly steel construction.
  • Improved Head Gasket Sealing: Provides consistent cylinder head clamping force.
  • Ideal for Restoration & Hot Rod Builds: Perfect for vintage Ford performance projects.

Description

Upgrade your vintage Ford engine build with the Top Street Performance Pro Series 1939-1948 Ford Flathead Offenhauser Cylinder Head Stud Kit. Designed specifically for Ford Flathead V8 engines equipped with compatible Offenhauser cylinder heads, this Ford Flathead head stud kit provides the clamping force and durability needed to help maintain reliable head gasket sealing in street, restoration, hot rod, and performance applications. Whether you're rebuilding a period-correct Flathead or assembling a traditional hot rod engine, these Flathead Ford head studs deliver dependable cylinder head retention under demanding operating conditions.

 

Improved Head Alignment & Clamping Force
Designed to replace conventional head bolts, these Flathead V8 cylinder head studs help guide cylinder heads into position during assembly while providing strong, consistent clamping force. Stud-style fasteners are commonly preferred for vintage Flathead builds because they support improved head gasket retention and accurate torque application.

High-Strength Performance Construction
Manufactured from heat-treated 35 chromoly steel with a minimum tensile strength of 190,000 PSI, these Ford Flathead cylinder head studs are built to withstand demanding engine conditions. Threads are rolled after heat treatment and protected with a black oxide finish and oil coating for enhanced durability and corrosion resistance.

Designed for Offenhauser Cylinder Head Applications
Engine-specific design provides compatibility with Ford Flathead V8 engines utilizing compatible Offenhauser cylinder heads. These Offenhauser head studs are ideal for restoration projects, traditional hot rods, vintage performance engines, and custom Flathead builds requiring dependable cylinder head hardware.

Ideal for Restoration & Hot Rod Builds
Perfect for cylinder head installation, head gasket replacement, engine assembly, and vintage performance projects where upgraded Ford Flathead performance hardware is recommended. An excellent choice for maintaining proper head gasket sealing and long-term reliability in classic Ford Flathead engines.

Specs

Torque 4 steps up to 45 ft-lbs, check after warmup
Color Black
Fastener Style Stud
Grade Performance
Head Style Hex
Material 35 Chromoly Steel
Quantity Sold as a kit

Engine Fitment

COMPATIBLE WITH
FORD FLATHEAD V8 (1939-1948)
• 3.6L / 221 in³
• 3.9L / 239 in³
• 4.2L / 255 in³

COMPATIBLE CYLINDER HEADS
• Offenhauser Flathead Cylinder Heads

COMMON VEHICLE APPLICATIONS
1939-1948 Ford Passenger Cars
1939-1947 Ford Pickup Trucks
1941-1948 Mercury Passenger Cars
Traditional Hot Rod Builds
Vintage Ford Restoration Projects
Custom Flathead-Powered Vehicles

NOTES
• Designed for 1939-1948 Ford Flathead V8 applications.
• Designed for compatible Offenhauser cylinder head installations.
• Verify cylinder head casting and application before ordering.
• Verify head gasket and cooling passage compatibility during installation.
• Not compatible with Ford Windsor, FE, Modular, Coyote, or Big Block Ford engines.

Q&A

What does this head stud kit fit?
This kit is designed for 1939-1948 Ford Flathead V8 engines utilizing compatible Offenhauser cylinder heads. Verify cylinder head casting and application before ordering.

Why use head studs instead of head bolts?
Head studs help provide more consistent clamping force, improved cylinder head alignment during installation, and reliable head gasket retention.

What engines are compatible with this kit?
Compatible Ford Flathead V8 applications include 221ci, 239ci, and 255ci engines using Offenhauser cylinder heads.

Are these suitable for hot rod applications?
Yes. This kit is ideal for traditional hot rods, vintage performance builds, restoration projects, and custom Flathead engine builds.

What material are the studs made from?
The studs are manufactured from heat-treated 35 chromoly steel with rolled threads, a black oxide finish, and corrosion-resistant oil coating.

Do head studs help improve head gasket sealing?
Yes. Consistent clamping force helps maintain reliable head gasket sealing and cylinder pressure control during engine operation.

Are these compatible with factory Flathead cylinder heads?
No. This kit is specifically designed for compatible Offenhauser cylinder head applications. Verify your cylinder head casting before ordering.

Can these be used during a complete engine rebuild?
Yes. This Ford Flathead head stud kit is ideal for engine rebuilds, cylinder head service, head gasket replacement, and complete engine assembly projects.

Emissions Notice

This product does not affect vehicle emissions and is not subject to emissions compliance regulations.