Are these ngk 3521 cr9eix iridium ix spark plugs?

These are correct and they perform flawlessly! Ron

Will these fit a 2019 polaris rzr turbo s

To be safe: check with dealer or a cross reference app to be sure. Ron

Will this work on my Harley Davidson 2018 street glide special?

I have a 2017 Road King with the Milwaukee 8 and this is the one it calls for.

Are these the right iridium plugs for an Indian scout 60?

NGK has multiple grades of plugs that may fit your engine. It is recommended to go to NGK site at https://ngksparkplugs.com/en/part-finder to verify the applications that will fit your engine. This site will show you all of the available plugs to fit your engine and will also show you which grade plug is recommended for the best performance of your specific engine.

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NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/--

NGK CR9EIX - Iridium IX Spark Plug - 4-Pack/--

Product ID: 471862111

Details

Brand
NGK
Core Material
Iridium
Thread Size
10mm
Top Material Type
Iridium
Vehicle Service Type
Car

⚡Iridium core for superior ignition

📦4-pack value bundle

🔧Direct OEM replacement fit

SAR 484

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Description

⚡ Ignite your drive with NGK’s elite spark plugs—because every start counts!

DURABILITY THAT LASTS - Engineered for extended lifespan and consistent performance
PRECISION IGNITION POWER - Iridium tip ensures faster, more reliable starts every time
VALUE PACKED CONVENIENCE - Four spark plugs in one package—ready to upgrade your ride
TRUSTED QUALITY ASSURANCE - Backed by NGK’s 4.8-star rating and genuine manufacturing
SEAMLESS OEM COMPATIBILITY - Exact fit for your vehicle, no modifications needed

The NGK CR9EIX Iridium IX Spark Plug 4-pack offers professional-grade ignition performance with a durable iridium core, ensuring reliable starts and long-lasting engine efficiency. Designed as a direct OEM replacement, these spark plugs fit seamlessly into compatible vehicles, delivering trusted NGK quality backed by excellent customer reviews.

Specifications

ASIN	B004SKYAWM
Best Sellers Rank	#382,788 in Car & Motorbike ( See Top 100 in Car & Motorbike ) #2,591 in Ignitions
Brand	NGK
Brand Name	NGK
Compatible with Vehicle Type	Car
Core Material	Iridium
Country of Origin	USA
Customer Reviews	4.8 out of 5 stars 566 Reviews
Item Weight	0.28 Pounds
Manufacturer	NGK
Manufacturer Part Number	CR9EIX
Model	3521
Number of Items	1
OEM Equivalent Part Number	7085731
Thread Size	10mm
Top Material Type	Iridium
Unit Count	1.0 Count
Vehicle Service Type	Car
What Is In the Box	3521

Reviews

S**T

Value

Good item would buy again

23.08.2024

R**R

Decent price

They Look good ngk quality plugs

30.11.2025

O**O

Pésimo material

Muy mala calidad del producto original.

24.06.2026

T**N

2024 Yamaha VX Limited Tr1 Engine

We use these plugs in our 2024 Yamaha VX limited waverunner with the TR-1 engine. They do NOT improve horsepower or top speed, so if your purchasing for one of those, that is a fools errand. What these plugs DO in fact benefit you is longevity and quicker firing at startups. Some folks are saying they notice quicker throttle response and all and that's just psychological foolery lol. These are an excellent replacement for the oem NKG CR9EB plugs if your looking for less changing intervals and improved startups.

19.05.2026

I**I

Great product at a great price

Plugs were perfectly packaged for overseas shipping. Arrived in expected time frame. Price was better than expected. Great company to deal with as they supplied timely ongoing updates of processes right up to delivery. Many thanks 👍

9.07.2024

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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2 months ago

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SAR 484

Duties & taxes included

In stock

Sold byAmazon KSADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to KSA.

Secure transaction

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Fast, free shipping, member pricing & priority support.

Join PRO →

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Customer service was outstanding when I had questions about the product.

2 days ago

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