NGK 3521 CR9EIX Iridium IX Spark Plug Pack Of 1
Why you'll like it
- Enhanced Throttle Response — 0.6mm fine iridium tip ensures extreme ignitability and quicker engine acceleration.
- Superior Anti-Fouling — Extended insulator nose prevents carbon buildup to maintain consistent spark performance.
- Exceptional Durability — High-melting-point iridium alloy withstands extreme thermal and electrical wear.
- Reliable Sealing — Triple gasket design eliminates combustion gas leakage for stable engine output.
- Corrosion Resistance — Trivalent metal plating provides strong anti-seizing and anti-corrosion properties.
Product details
Description
Experience enhanced engine performance and superior throttle response with the NGK CR9EIX Iridium IX Spark Plug. Engineered specifically for performance enthusiasts and high-revving engines, this spark plug features an ultra-fine 0.6mm laser-welded iridium center electrode that delivers extreme ignitability and consistent spark stability under demanding conditions.
The advanced design incorporates a tapered ground electrode to minimize electrical quenching, along with a longer insulator nose that effectively prevents carbon fouling. Built with durable, corrosion-resistant trivalent metal plating and a triple gasket seal, this spark plug prevents combustion gas leakage and withstands intense thermal wear.
Whether you are upgrading your motorcycle, ATV, or high-performance car, this component ensures smoother acceleration, reliable cold starts, and prolonged operating longevity.
How to use
- Ensure the engine is completely cool before installation.
- Remove the existing spark plug carefully and clean the surrounding area of any debris.
- Check and adjust the gap if necessary according to your vehicle manufacturer specifications.
- Thread the NGK Iridium IX spark plug in by hand to avoid cross-threading, then tighten to the recommended torque specification using a spark plug socket wrench.
Ingredients
Iridium alloy center electrode, copper core terminal, high-grade ceramic insulator with corrugated ribs, trivalent metal plated steel shell, nickel alloy ground electrode.
As printed by the brand. Check the pack label if you have an allergy.
Specifications
| Brand | NGK |
|---|---|
| Ships from | USA (sourced directly), checked in Navi Mumbai |
| Sold by | Dropy.in |
Ratings & reviews
From our customers
Top reviews first: highest rated, with photos first
- Siddharth K.4 ★
fukatach vatla tha kaam nahi karnar
mi tar fukt try karnyastava magvla hota karan old plug kharab zala hota, pan spark chalu zalyavar kharach gadi cha pickup chhan vatla. engine chya starting la problem nahi yet ata. chota size ahe pan farak padla.
- Amit S.4 ★
beta ke liye liya tha
bought this for my son's motorcycle because he was complaining about rough idling and poor pickup. he fitted it himself and said the acceleration feels cleaner now. mileage is also slightly better than before. packing could have been better though.
- Rohan M.4 ★
box was slightly crushed
the outer packaging was a bit damaged when it arrived which made me worried about the part inside. thankfully the plug itself looked okay and undamaged. installed it in my bike and the throttle response feels a lot smoother now. engine starts up quite reliably even on chilly mornings.
FAQs
How long do NGK Iridium IX spark plugs last?
NGK Iridium IX spark plugs are engineered for exceptional longevity, typically lasting between 40,000 to 60,000 miles depending on vehicle condition and driving habits. The high melting point of the iridium alloy resists electrical wear to maintain stable performance over an extended lifespan.
What vehicles are compatible with the NGK CR9EIX spark plug?
The NGK CR9EIX spark plug is designed for various high-performance motorcycles, ATVs, and specific automotive engines requiring a 10mm thread diameter and 19mm reach. Always verify your vehicle manufacturer specifications and recommended heat range before installation.
What are the key benefits of an iridium spark plug over standard copper plugs?
Iridium spark plugs feature a much finer center electrode compared to traditional copper plugs, requiring less voltage to fire. This results in superior ignitability, improved fuel efficiency, smoother acceleration, and significantly higher resistance to fouling and wear.
Are these imported NGK spark plugs available on Dropy authentic?
Yes, all products offered through Dropy are 100% authentic items sourced directly from the United States. We ensure genuine quality for all imported performance automotive parts delivered across India.
Does the NGK CR9EIX improve fuel efficiency?
Yes, by providing a more complete and efficient combustion cycle through its fine wire iridium tip, this spark plug helps optimize fuel burning. This can lead to improved overall fuel economy and smoother engine operation.
How long will delivery take?
Most orders arrive in 15–20 days: we source each product directly from the USA, check it at our Navi Mumbai warehouse and pack it on video. Items marked Dropy Express ship from our India warehouse and arrive in 3–5 days.
Is cash on delivery available?
Full cash on delivery is available all over India on Dropy Express items. For other orders from ₹2,499 to ₹15,000 you can use Partial COD: pay 25% online now and the rest in cash on delivery.
Are your products genuine?
Yes. Every product is 100% authentic, sourced directly from the USA, quality-checked and packed on video at our Navi Mumbai warehouse.
What if my order arrives damaged or wrong?
Write to us at [email protected] as soon as it arrives. Damaged, wrong or not as described, our Buyer Protection gives you a full refund. The details are in our Return, Refund & Cancellation Policy.
Is delivery free?
Delivery is free on orders from ₹1,499. Below that a ₹79 delivery fee applies.