NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. These are “colder than stock” NGK spark plugs meant for high boost/high power engines used in motorsports. We use the BKR9eix plugs in a huge range of engines throughout all types of motorsports.
Recommended for the following Engines:
- Honda K series K20 and K24 500whp+
- Toyota 1jz and 2jz 650whp+
- Nissan SR20det 600whp+
- Nissan RB26, RB25 and RB20 650whp+
- Honda B and D series engines 450whp+
- Mitsubishi 4g63 DSM and EVO engines 550whp+
NGK Spark Plugs (U.S.A.), Inc. is the largest OE supplier and manufacturer of spark plugs for domestic and import vehicles in North America. Its OE legacy, unsurpassed quality and leading vehicles in operation coverage reinforces NGK as The Ignition Specialist™. With over 80 years of automotive expertise NGK has built a reputation for quality and reliability; manufacturing spark plugs for virtually every automotive, motorcycle, marine and small engine application. We are committed to be the premier partner with our customers, while maintaining original equipment standards for the highest durability and operational performance. With state-of-the-art manufacturing, inventory and distribution facilities in North America and across the globe, NGK is dedicated to providing customers with world-class products and services.