NGK (2668) BKR8EIX Iridium IX Spark Plug 4-Pack

Fits the 8th Gen Honda Civic Si 

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

The 0.6mm laser-welded fine Iridium tip ensures high durability, a consistently stable spark, and the tapered ground electrode minimizes electrical quenching effect.  The  longer insulator nose prevents fouling, the corrugated ribs on the insulator prevents flashover, and a triple gasket seal eliminates combustion gas leakage Iridium alloy has extremely high melting point, giving it high durability to heat and electrical wear -  perfect for today's high-performance engines.  Trivalent metal plating has superior anti-corrosion and anti-seizing properties.   

Works perfect in K20z3 forced induction setups looking for 1 heat range colder.