Check the listing for details. Harley Davidson Big Twin 91-98 FXD Dyna Softail Spark Plug Wires Copper Core. Color: Yellow, Condition: New. Listed at 17.99 USD. Pair of Yellow 7mm Copper core spark plug wiresDescription:Consists of one 8" and one 20" long wires pre-crimped. Great for replacement wire, relocation kits, new look, bobbers, scramblers, cafe racer etc. Fits older Harley-Davidson Big-Twin years up to 1998 that has the coil mounted on the seat post. Ton's Performance wires are built with a tinned copper conductor with a high dielectric insulator, and a layer of silicone with final thickness of 7mm to protect against heat and tears. Ton's is one of very few companies that offers custom wires for many different applications in the aftermarket motorsports world. If you need a set of ready to install or universal wires for a custom built project, send us a message for more details.Black 90 degree and straight bootsHigh Quality terminalsCopper core wire, Yellow SiliconeAssembled in Houston, Texas