Iridium construction: Provides extreme ignitability and improved throttle response
Superior anti-fouling: Reduces deposits for longer service life
High melting point: Offers greater protection from chemical attack
Small diameter electrode (0.6 mm): Allows for compact design without sacrificing performance
Taper cut ground electrode: Enhances gas flow properties and lower voltage requirements
Summarized by Shop
NGK CR9EIX Iridium Spark Plug – 3521
The NGK CR9EIX is a premium iridium spark plug engineered for long life and consistent performance. Featuring a fine-wire 0.6mm iridium center electrode, it improves ignition efficiency and throttle response. A tapered cut ground electrode reduces quenching, and the high-alumina ceramic insulator offer