4-wire set. Includes one 34" 90° coil 135° plug + one 30.5" 90 coil PC plug (front) and one 18" 90° coil 135° plug + one 17.25" 90° coil PC plug (rear). These are 8mm wire sets; ready to install; with a Spiro-Pro (sprial wound) core of 350 ohms/ft. and a 2 layer 100% silicone jacket and 100% silicone low profile ProBoots with double spring locking spark plug terminals that will resist vibrations. Excellent RFI suppression for complex multi-spark ignition systems. Compatible with both electronic or points style ignitions. Plug boots and wires are matching colors; coil boots are always black. Note: Some electronic ignition manufacturers do not recommend using spiral wound core cables. Check the instruction manual of your electronic ignition module for more information. When in doubt it is advised to use suppression core cables for electronic ignition set-ups.