Iridium Ignition Kit For Grand Cherokee & Commander 3.7l 2005-2008 Irp/xk/003i Submitted by admin on Fri, 11/03/2023 - 02:56 6 x IRIDIUM Spark Plug. Many cars have more than one option, even though the compatibilty info says that it fits your car. Tags: iridiumignitiongrandcherokeecommander2005-2008irpxk003i