Moroso's Ultra 40 spark plug wire set brings race-proven ignition wire technology to your Ford 289 or 302 engine. Each set ships complete and ready to install, with every wire labeled by cylinder to eliminate guesswork during installation. The 8.65mm diameter construction and 40 ohms of resistance per foot deliver the suppression and conductivity balance demanded by high-performance and racing applications.
Race-proven wire construction. The Ultra 40 wire core is the same material Moroso uses in full competition builds. At 40 ohms of resistance per foot, it suppresses RFI interference without choking the spark energy reaching the plug, keeping ignition timing consistent under load.
Engine-specific fitment, labeled and ready to run. Each set is cut and terminated to fit the 289/302 layout directly. Individual cylinder labeling speeds up installation and prevents misrouting, which matters on tightly packaged small-block Ford builds where wire length and routing affect heat management.
Configurable to your ignition and environment. Sets are available with HEI or non-HEI terminals to match your distributor cap, and in sleeved or unsleeved versions depending on your underhood heat situation. Black, red, and blue color options let the wires complement the rest of the engine bay.
Product Benefits
- Race-Proven Core: Ultra 40 wire used in competition applications, now in a street-ready set.
- 8.65mm Diameter: Heavy-gauge construction for durability and consistent electrical performance.
- 40 Ohms/Foot Resistance: Balances RFI suppression with strong spark delivery.
- Cylinder-Labeled Wires: Each wire is marked for its cylinder, simplifying installation.
- HEI or Non-HEI Terminals: Select the correct termination for your distributor cap style.
- Sleeved or Unsleeved: Choose heat sleeving based on your underhood temperatures.
- Color Options: Available in black, red, or blue to suit your engine bay.
- Complete Kit: Everything needed for a full wire replacement ships in one set.
Note: Fits Ford 289 and 302 engines. Select HEI or non-HEI, sleeved or unsleeved, and your preferred wire color when ordering.
About Moroso: Moroso Performance Products has manufactured racing and high-performance components for decades, supplying professional teams and serious enthusiasts across drag racing, road racing, and circle track disciplines. The Moroso catalog covers ignition, oiling, fuel, and electrical systems, with each product developed to withstand the demands of competition use.
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Product Specifications & Vehicle Fitment
Review the product details and confirm compatibility with your vehicle before ordering.
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