NGK 6441 ZFR6FIX-11 Iridium IX Spark Plug, Pack of 4

The Iridium IX spark plug is specifically designed for performance enthusiasts, offering unparalleled ignitability, improved throttle response, and superior fouling resistance.

With its 0.6mm laser-welded fine iridium tip and tapered ground electrode, this plug ensures a consistently stable spark and minimizes electrical quenching effect.

The longer insulator nose and corrugated ribs on the insulator prevent fouling, while the triple gasket seal eliminates combustion gas leakage.

Plus, the iridium alloy has an extremely high melting point, providing unmatched durability to heat and electrical wear.

Don't settle for anything less – choose the Iridium IX spark plug for your high-performance engine.