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Spark Plug Wires (Kit) for Harley Davidson® Street Rod 500 & 750 XG & XGR

Available in Pro 8mm and ThunderVolt 8.2mm Custom Kits

*** PLEASE NOTE, THE LENGTHS OF THESE WIRES WERE CHANGED BY HARLEY 6 MONTHS AFTER THE RELEASE OF THIS MODEL. SHOULD YOU HAVE AN EARLY SET WITH THE INCORRECT LENGTHS, PLEASE CALL US AND WE WILL REPLACE THEM FOR YOU*** 

Pro 8mm Custom Kits

  • Spiro-Pro 8mm Wire is the top choice of racers and enthusiasts due to its affordable value and overall high performance features.
  • Spiro-Pro’s two-layer 100% silicone inner core & outer jacket keeps the wires flexible for the life of your vehicle maintaining its vibrant color with heat protection to 600º F.
  • Taylor Cable’s Spiro-Pro wire consists of a high conductive spiral wound core with a Stainless Steel wire and covered with a fluorocarbon conductive material.
  • Spiro-Pro features 350 ohms per foot resistance which provides more fire power to the spark plugs than OEM resistor core wires and has up to 10 times less resistance than standard resistor core wires.
  • Spiro-Pro eliminates radio frequency interference (RFI) and is recommended when using a multi spark discharge, electronic ignition systems
    and other electronic components.
  • Features Taylor Cable’s EXCLUSIVE low profile 100% silicone PROBOOTS® with vibration proof Stainless Steel double spring locking spark plug terminals.
  • Choice of 11 vibrant colors in Universal Wire Sets; Black, Blue, Red, Purple, Yellow, Hot Orange, Hot Lime, Hot Pink, Teal, White and Grey.

ThunderVolt 8.2mm Custom Kits

These are the absolute Best Spark Plug Wires your money can buy!

All wires fire intermittently no matter what coil or ignition you may have. That is why you see carbon on your plugs. ThunderVolts with 40 ohms of resistance, have a solid stream of fire power resulting in more horsepower and more mileage. Your bike will start and run better than ever before! They are compatible with Harley ignition systems.

  • Spiro-Pro 8mm Wire is the top choice of racers and enthusiasts due to its affordable value and overall high performance features.
  • Spiro-Pro’s two-layer 100% silicone inner core & outer jacket keeps the wires flexible for the life of your vehicle maintaining its vibrant color with heat protection to 600º F.
  • Taylor Cable’s Spiro-Pro wire consists of a high conductive spiral wound core with a Stainless Steel wire and covered with a fluorocarbon conductive material.
  • Spiro-Pro features 350 ohms per foot resistance which provides more fire power to the spark plugs than OEM resistor core wires and has up to 10 times less resistance than standard resistor core wires.
  • Spiro-Pro eliminates radio frequency interference (RFI) and is recommended when using a multi spark discharge, electronic ignition systems
    and other electronic components.
  • Features Taylor Cable’s EXCLUSIVE low profile 100% silicone PROBOOTS® with vibration proof Stainless Steel double spring locking spark plug terminals.
  • Choice of 6 vibrant colors in Universal Wire Sets: Black, Blue, Red, Purple, Yellow, Orange.

Check out what Baggers Magazine had to say about our high performance spark plug wires!

100% Made in USA

Sumax Cycle Products sells quality, durability, and reliable products. So, if your spark plug wires or battery cables ever break down, simply return them to us. We will replace them at no charge. We stand by our products for a lifetime.

As of August 31, 2018, we are Prop 65 compliant. https://www.p65warnings.ca.gov/

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