Designed for fuel-injected and turbo engines. The plugs have a fine-wire Iridium center electrode and nickel-alloy terrain electrodes for maximum engine and torque. The plugs provide a lifetime of 40,000 kilometres. They can be replaced with any other spark plug, after which they will need to be replaced. Notably, the LFR5AIX-11 has been discontinued due to technical reasons. It is not recommended to use it on diesel engines.