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.
š§ Iridium tip offers exceptional durability and spark efficiency š§ Fine-wire design improves ignition and throttle response š§ Resists fouling for reliable high-RPM performance š§ Pre-gapped for quick, hassle-free installation
Brand & Part
At TXN Supply, we're driven by a passion for quality and reliability. Whether you're a DIY mechanic, an automotive professional, or just looking for top-notch essentials, we provide premium spark plugs, oil filters, fluids, and more from trusted brands like Champion, NGK, and ACDelco.
Our mission is simple: to deliver high-quality auto parts and everyday must-haves with fast shipping and great prices!
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We offer a 30-day return period. Items must be in original condition. Buyer is responsible for return shipping unless the item is defective or incorrect. Refunds are processed once the item is received. Contact us for any return assistance.



