8mm Black Ignition Cable Kit Equal Length Harley Davidson Sportster, FXR, FXRS, FXRT High performance ignition cables cut to size and with the pre-assembled connections for related models. The spark plug hoses are the same color as the lead. Spiro-Pro cables have a carbon fiber core and can be used with both point and electronic ignition. Taylor »Spiro-Pro« ignition cable kit, for FXR, FXRS, FXRT and Sportster models from 2000 onwards, with ignition coil between cylinders, silicone, black (a), Ø 8 mm, Length 12 – 31 cm approx.