Moroso Ultra 40 Unsleeved Spark Plug Wire Sets

Strong Spark for Less

Ultra 40 Unsleeved Spark Plug Wires are a cost-effective performance wire without heat sleeving. The wires feature a Kevlar core, four times stronger than other aramid fiber cores, which increases the tensile strength of the wire while reducing its center diameter. That allows for the surrounding insulation to be thicker, resulting in higher dielectric efficiency. With only 40-ohms of resistance per foot, these wires will increase power by bringing more spark to the plug. RFI/EMI resistant to eliminate stereo feedback or ignition interference.