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Vehicle Info NeededUltra 40 Race Spark Plug Wire Set LS Series
Ships on 10/26/2026
Lowest Price Guarantee- Ultra 40 Race Spark Plug Wire Set
- GM LS Series
- Sleeved Wire Set
- Fits Stock or Moroso tall Valve Covers
- 12" Wire Length
- 7mm
Ultra 40 GM LS Series 12" Long Sleeved Race Ignition Wire Set, Fits stock or tall Moroso valve covers, Fold over crimping won't vibrate loose like other brands, Nylon pull tape under silicone jacket provides unbeatable pull strenght and terminal retention. Ultra 40 Custom Fit Wire Set, Blue Wire, Sleeved, GM LS Series, Coil-on Plug Boots, LongExterior 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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