Champion Spark Plug - Iridium, Set
Iridium is a precious metal that is 6 times harder and 8 times stronger than platinum, it has a 1,200=F higher melting point than platinum and conducts electricity better. This makes it possible to create the finest wire center electrode ever. Until now, Champion has favored platinum for their long life and high melting point. The technology did not exist previously to machine and bond iridium on a spark plug electrode in a cost effective manner. Champion has made costly iridium industrial and aviation plugs since the 1960's, and these are now finally available for automotive applications.
Fits all years Jensen Healey and '70's Lotus vehicles. Sold in sets of four for one engine.