100% Made in U.S.A. Spark Plug Wires a Working Man can Afford!

 Plug wires feature a low resistance conductor that is wrapped in durable silicone double layer jacketing for heat protection, strength and durability.

8mm Black Silicone and Synthetic Jacketing resist heat, oil, and abrasion. 500 ohm per foot resistance delivering greater spark energy, while improving power, idle, and fuel efficiency. A combination Kevlar Helically Spiral Wound Core conductor for greater strength and durability that suppresses Electro Magnetic (EMI) and Radio Frequency Interference (RFI). Wires are compatible with all year Harley models. Matching Black Silicone Boots protects against high exhaust temperatures. Double Spring Locking Terminals for secure-vibration proof connections.


8mmStreeThunder Card


Bagger Touring FL:
Street Glide, Road Glide, Electra Glide & Road King

TEC # Description Sumax #
33343 2009 Up Touring Models ST-236
33342 1999-2008 Touring With Fuel Injections ST-234
33341 1999-2008 Touring With Carburetor ST-233
33345 1980-1988 FL Touring ST-733
33344 1965-1979 FL Touring ST-731


33340 Softail 1999 up Twin Cam Motor (Except Rocker) ST-231
33344 Softail 1989-99 Evolution Motor ST-731

Dyna & Early FX:

33340 Dyna Models 1999 up Twin Cam ST-231
33344 Dyna Models 1991-98 up Evolution  ST-731
33344 FX Models 1965-85 ST-731


33346 FXR ALL Models with Center Mount Coil ST-735

Sportster Models:

33341 Sportster 2007 Up ST-233
33342 Sportster 2004-2006 ST-234
33345 Sportster 1986-2003 (Except Sport Model) ST-733
33344  Sportster 1965-1985 ST-731