Spark Plug, NGK High Performance - E36, E46, E39, Z3, Z4

The spark plug serious enthusiasts rely on!

NGK's Iridium IX spark plug is an excellent upgrade for heavily tracked or forced induction E36, E46, E39, Z3, and Z4 engines needing a durable plug with a tip that maintains a proper operating temperature. The temperature range of these plugs is suggested for modified BMW engines with increased compression, aggressive ignition and cam timing, and/or forced induction. Getting the correct temperature range plug will maintain a temperature high enough to prevent fouling yet be cool enough to prevent pre-ignition. While there are many things that can cause pre-ignition, selecting a spark plug in the proper heat range will ensure that the spark plug itself is not a hot spot source in the combustion chamber.

Designed specifically for the performance enthusiast. Iridium IX® offers extreme ignitability, improved throttle response and superior anti-fouling.

 - Fine Iridium tip ensures high durability and a consistently stable spark
 - Iridium alloy has extremely high melting point, perfect for today’s high-tech, high-performance engines
 - Trivalent Metal Plating - superior anti-corrosion and anti-seizing properties
 - Improved acceleration, increased fuel efficiency and durability

Priced per plug. It's always recommended to replace all plugs at the same time.