Securing headers to a Ford 4.6L or 5.4L block demands fasteners that can handle sustained heat cycles, exhaust pressure, and the vibration that comes with performance use. Moroso's 16-piece header bolt kit supplies Grade 10.9 flange head bolts sized for the 8mm Ford header pattern, giving you a complete, ready-to-install set of hardware in a single package.
Grade 10.9 strength where it matters most. Grade 10.9 is the metric equivalent of SAE Grade 8, meaning these bolts resist stretching and backing out under the thermal expansion and contraction that exhaust headers experience with every drive cycle. Stock or replacement header installations benefit from fasteners matched to the application rather than generic hardware-store substitutes.
Flange head design for consistent clamping. The integrated flange spreads clamping load across a wider seat area without requiring a separate washer. That eliminates a potential failure point and keeps the joint sealed against exhaust leaks at the header flange.
Clear zinc finish for corrosion resistance. The clear zinc coating protects the bolt shank and threads against rust in the high-heat, high-moisture environment directly around the exhaust, extending service life and making future removal easier.
Product Benefits
- Complete Kit: Sixteen bolts per package cover a full V8 header installation with no separate sourcing required.
- Grade 10.9 Rating: Metric equivalent to SAE Grade 8; resists stretching and loosening under heat cycling.
- Flange Head Style: Built-in flange distributes clamping load without a separate washer.
- 8mm Fitment: Sized for the Ford 4.6L and 5.4L header bolt pattern.
- Clear Zinc Finish: Protects against corrosion in the high-heat exhaust environment.
Note: Fits Ford 4.6L and 5.4L engines. Verify thread pitch and bolt length against your specific header before installation.
About Moroso: Moroso Performance Products has manufactured racing and performance accessories for decades, supplying professional race teams and enthusiast builders with oil pans, vacuum pumps, ignition components, and specialty hardware engineered for demanding motorsport applications.
WARNING: California Residents: Cancer and Reproductive Harm;
www.p65warnings.ca.gov
Product Specifications & Vehicle Fitment
Review the product details and confirm compatibility with your vehicle before ordering.
| Specification | Details |
|---|---|
| Vehicle Trim | GT, GT500 |
