Moroso's Ultra 40 spark plug wire set brings race-proven ignition wire technology to your Ford 351W build. These custom-fit wires arrive ready to install, with each wire labeled by cylinder so routing is straightforward and guesswork is eliminated from the process. The unsleeved design keeps the profile clean in engine bays where heat management is handled elsewhere.
40-ohm-per-foot spiral core construction. The 8.65mm diameter wire uses a 40-ohm-per-foot resistive core that suppresses radio frequency interference without killing spark energy. The result is a strong, consistent spark at each plug across the full RPM range, which matters most under sustained wide-open-throttle conditions.
Custom fit for the 351W. Every wire in the set is cut and terminated specifically for the 351W firing order and intake configuration, so there is no trimming or re-terminating required. Pulling the old wires and installing the Moroso set is a direct swap.
Available in three colors. The Ultra 40 set is offered in black, blue, or red for HEI unsleeved applications, allowing the wires to complement the engine bay finish or color scheme of the build.
Product Benefits
- Race-Proven Core: Ultra 40 construction is validated in competition environments before reaching street and strip applications.
- 8.65mm Diameter: Thicker jacket provides durability and protection against abrasion and heat exposure.
- 40 Ohms/Foot Resistance: Suppresses RFI while delivering a strong, consistent spark to each cylinder.
- Cylinder-Labeled Wires: Each wire is marked for its corresponding cylinder, simplifying installation and reducing the chance of misrouting.
- Custom Fit: Pre-terminated for the Ford 351W, no cutting or reterminating needed.
- Three Color Options: Available in black, blue, or red to match your engine bay aesthetic.
- Ready to Install: Complete set with all necessary wires included.
Note: Fits Ford 351W engines. Specified for HEI distributor applications. Available unsleeved only in this configuration. Select your preferred color (black, blue, or red) from the product options.
About Moroso: Moroso Performance Products has manufactured high-performance racing components since 1968, supplying professional and amateur racers with ignition, oiling, and fuel system parts developed on real racing programs. Their spark plug wire sets reflect decades of motorsport development applied to both dedicated race builds and high-performance street applications.
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Product Specifications & Vehicle Fitment
Review the product details and confirm compatibility with your vehicle before ordering.
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