4 Pack NGK Iridium IX 3521 Spark Plugs CR9EIX ps

The NGK 3521 Iridium IX Spark Plug (CR9EIX) is engineered for high-performance motorcycles and powersport engines, delivering superior ignitability, throttle response, and durability. Featuring an ultra-fine iridium center electrode, it provides stable combustion, reduced fouling, and long service life under demanding riding conditions.

Features & Benefits:

🔧 Iridium tip offers exceptional durability and spark efficiency
🔧 Fine-wire design improves ignition and throttle response
🔧 Resists fouling for reliable high-RPM performance
🔧 Pre-gapped for quick, hassle-free installation

Specifications:

Brand & Part