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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 $180.40
Sale price $180.40 Regular price $205.00
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 Ford Flathead V8 applications; verify year, displacement and head style before ordering
  • Stud kit with Hex hardware and 35 Chromoly Steel construction for performance engine builds
  • Provides strong, consistent clamping force to support head gasket sealing and cylinder pressure control
  • Application-specific torque procedure listed in specs: 4 steps up to 45 ft-lbs, check after warmup

Description

Upgrade your Ford Flathead build with a Pro Series cylinder head stud kit engineered for stronger clamping force, accurate torque readings, and reliable cylinder head sealing. Built for performance engine assembly, this kit helps improve head gasket retention and long-term durability under higher cylinder pressure.

Improved Head Alignment & Clamping
Stud-style fasteners help guide the cylinder head into position during assembly while providing strong, consistent clamping force for improved head gasket sealing.

Performance Fastener Construction
Constructed from 35 Chromoly Steel with a Black finish, this kit is designed for strength, corrosion resistance, and dependable performance during demanding engine operation.

Torque-Specific Installation
Designed for the listed application torque procedure: 4 steps up to 45 ft-lbs, check after warmup. Always follow the correct torque sequence, lubricant instructions, and any re-torque requirements for your engine.

Complete Application-Specific Kit
Sold as a kit. Verify cylinder head style, block thread size, and application notes before installation to ensure proper fitment.

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 ENGINES
• 3.6L / 221 in³
• 3.9L / 239 in³
• 4.2L / 255 in³

COMMON VEHICLE APPLICATIONS
Ford passenger cars (1939–1948 Flathead V8 equipped)
Ford trucks using compatible Flathead V8 engines
Hot rod and vintage Ford Flathead builds
Offenhauser-style Flathead cylinder head applications (where listed)

NOTES

Verify year range, head style, gasket selection, and cooling passage compatibility before installation.

Designed for Ford Flathead Offenhauser-style cylinder head stud applications.

Not compatible with Ford Small Block Windsor, FE, Coyote, or Big Block Ford engines.

Q&A

What engines are these cylinder heads compatible with?
These cylinder heads are designed for COMPATIBLE WITH, Ford Flathead V8, NOTE: Fits 1939-1948 applications with Offenhauser cylinder heads.


Are these heads assembled or bare?
Configuration should be confirmed in the product details.


What material are these cylinder heads made from?
They are made from 35 chromoly steel, which helps reduce weight and improve heat dissipation.


Will these cylinder heads improve engine performance?
Yes, performance cylinder heads are designed to improve airflow, which can increase horsepower, torque, and overall engine efficiency.


Are these a good upgrade over stock cylinder heads?
Yes, these cylinder heads are a strong upgrade for improving airflow and overall engine performance compared to factory heads.


Do these heads require additional components for installation?
Depending on your setup, additional components such as gaskets, pushrods, valve train components, or tuning may be required.


Are these suitable for street or race applications?
These cylinder heads can be used for street performance and performance builds depending on the overall engine combination.

Emissions Notice

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