NGK BKR8EIX 2668 Iridium Spark Plugs
Heat Range = 8
Thread Size = 14mm
Thread Reach = 19mm or ¾”
IX = High Performance Iridium
These Spark Plugs are not for your daily drivers and they are not for your Normally Aspirated Builds. They are for your high boost builds pushing 400hp and above!!!
NGK’s heat range gets a cooler spark plug as the numbers go numerically higher.
The BKR8EIX is the spark plug of choice by tuners for use in hi horse power Turbo & Super Charged applications.
4 Cylinder = 4 Spark Plugs, 6 Cylinder = 6 Spark Plugs, 8 Cylinder = 8 Spark Plugs,