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Vehicle Info NeededUltra 40 Sleeved Spark Plug Wire Set Small Block Ford 289-302
Ships on 09/14/2026
Lowest Price Guarantee- Ultra 40 Sleeved Spark Plug Wire Set
- Small Block Ford 289-302
- HEI Style Distributor Cap (Male Post)
- 135° Spark Plug Boots
- Black
- 8.65mm
Ultra 40 Race Wire; Sleeved, Ford 289-302 Hei Style Cap, BlackUltra 40 Custom Fit Wire Set, Black Wire, Sleeved, Ford 289-302 HEIExterior sleeving offers improved dielectric strength for added resistance to outside pulses while electrical protecting wire against heat, chafing and contaminants• 8.65mm diameter wire with 40 ohms of resistance per foot• Sleeving adds extra dielectric strength which is wire’s ability to not be affected by outside electrical pulses• Sleeving extends spark plug wire life and protects against exhaust header heat, chaffing and contaminants• Complete, ready to install sets available for specific engines
Powerful Spark Plug Wires
The extra insulation in Moroso Ultra 40 Race Spark Plug Wires protects against exhaust header heat, chaffing and contaminants to extend the life of the wire. Closely-woven fiberglass that is impregnated with high-voltage, leak-resistant silicone, adds up to 8,000 volts of extra insulation. At 40 ohms of resistance per foot, the Ultra 40 Spark Plug Wire incorporates a spiral-wound nickel/copper alloy conductor wrapped at the optimum ratio to produce the highest level of spark energy, while producing the lowest level of electromagnetic and radio frequency interference. The Kevlar core is four times stronger than other aramid fiber cores, resulting in exceptional dielectric strength for the highest spark energy transfer. EMI/RFI suppression. and horsepower gains.
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