There are three different types of ignition leads, copper core, resistive and reactive which differ based on the materials used for the conductor and the type of resistor required for interference suppression.
6x NGK U5014 / 48041 Ignition Coil Genuine NGK Component
GENUINE NGK SILICONE BLUE IGNITION LEADS WIRES FIT MAZDA MX5 EUNOS MIATA 1989-06
NGK High Performance Ignition Coil Set 8 For Audi Porsche VW Petrol 06D905115
NGK 4 Pin Ignition Coil Packs For Audi R8 Porsche Vw Coil On Plug Upgrade x4
NGK U5099 48295 Ignition Coil
NGK U6039 48404 Ignition Coil
