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NGK  |  SKU: NGK3521

NGK IX Iridium Spark Plug Box of 4 (CR9EIX)

$58.93
Shipping calculated at checkout.

Description
NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug.

This Part Fits:

Year Make Model Submodel
2010 Aprilia RSV4 Factory Base
2011 Aprilia RSV4 Factory SE Base
2010-2011 Aprilia RSV4 R Base
2006-2009 Aprilia Scarabeo 100 Base
2016-2019 Arctic Cat Bearcat 7000 XT Base
2017-2018 Arctic Cat Bearcat 7000 XT GS Base
2016 Arctic Cat M 7000 Limited 153 Base
2016 Arctic Cat M 7000 Limited 162 Base
2015-2016 Arctic Cat M 7000 Sno Pro 153 Base
2016 Arctic Cat M 7000 Sno Pro 162 Base
2015-2016,2018 Arctic Cat Pantera 7000 Base
2015-2019 Arctic Cat Pantera 7000 Limited Base
2016-2019 Arctic Cat Pantera 7000 XT Limited Base
2020 Arctic Cat Wildcat XX Base
2015 Arctic Cat XF 7000 Cross Country Base
2014 Arctic Cat XF 7000 Cross Country Sno Pro Base
2014-2018 Arctic Cat XF 7000 Crosstour Base
2016-2018 Arctic Cat XF 7000 Crosstrek Base
2015-2016 Arctic Cat XF 7000 High Country Base
2014-2015 Arctic Cat XF 7000 Limited Base
2014-2015 Arctic Cat XF 7000 LXR Base
2014-2015 Arctic Cat XF 7000 Sno Pro Base
2018 Arctic Cat ZR 7000 129 Base
2018-2019 Arctic Cat ZR 7000 137 Base
2015-2017 Arctic Cat ZR 7000 El Tigre Base
2014-2015 Arctic Cat ZR 7000 Limited Base
2016 Arctic Cat ZR 7000 Limited 129 Base
2016-2019 Arctic Cat ZR 7000 Limited 137 Base
2019 Arctic Cat ZR 7000 Limited 137 iACT Base
2014-2015 Arctic Cat ZR 7000 LXR Base
2016-2017 Arctic Cat ZR 7000 LXR 129 Base
2016-2017 Arctic Cat ZR 7000 LXR 137 Base
2015-2016 Arctic Cat ZR 7000 RR Base
2014-2015 Arctic Cat ZR 7000 Sno Pro Base
2016,2018 Arctic Cat ZR 7000 Sno Pro 129 Base
2016-2018 Arctic Cat ZR 7000 Sno Pro 137 Base
2002-2003 Cannondale Blaze 440 Base
2002 Cannondale C440R Base
2002-2003 Cannondale Cannibal 440 Base
2002 Cannondale E440 Base
2002 Cannondale Moto 440 Base
2002-2003 Cannondale Speed 440 Base
2002 Cannondale X440 Base
2004-2006 Ducati 749 Base
2005-2006 Ducati 749 Dark Base
2004-2005 Ducati 749R Base
2004-2006 Ducati 749S Base
2003 Ducati 998 Biposto Base
2004 Ducati 998 Matrix Base
2003 Ducati 998 Monoposto Base
2004-2007 Ducati ST3 Base
2018 Harley-Davidson FLDE Deluxe 107 Base
2018 Harley-Davidson FLFB Fat Boy 107 Base
2018 Harley-Davidson FLFBS Fat Boy 114 Base
2018 Harley-Davidson FLHC Heritage Classic 107 Base
2018 Harley-Davidson FLHCS Heritage Classic 114 Base
2017-2019 Harley-Davidson FLHR Road King Base
2017-2019 Harley-Davidson FLHRXS Road King Special Base
2017-2019 Harley-Davidson FLHTCU Electra Glide Ultra Classic Base
2017-2019 Harley-Davidson FLHTCUTG Tri Glide Ultra Base
2017-2019 Harley-Davidson FLHTK Ultra Limited Base
2017-2019 Harley-Davidson FLHTKL Ultra Limited Low Base
2017-2019 Harley-Davidson FLHTKSE CVO Limited Base
2017-2019 Harley-Davidson FLHX Street Glide Base
2017-2019 Harley-Davidson FLHXS Street Glide Special Base
2017-2019 Harley-Davidson FLHXSE CVO Street Glide Base
2017-2019 Harley-Davidson FLRT Freewheeler Base
2018-2019 Harley-Davidson FLSB Sport Glide 107 Base
2018-2019 Harley-Davidson FLSL Softail Slim 107 Base
2017-2019 Harley-Davidson FLTRU Road Glide Ultra Base
2017-2019 Harley-Davidson FLTRX Road Glide Base
2017-2019 Harley-Davidson FLTRXS Road Glide Special Base
2018-2019 Harley-Davidson FLTRXSE CVO Road Glide Base
2018-2019 Harley-Davidson FXBB Street Bob 107 Base
2018-2019 Harley-Davidson FXBR Breakout 107 Base
2018-2019 Harley-Davidson FXBRS Breakout 114 Base
2019 Harley-Davidson FXDRS FXDR 114 Base
2018-2019 Harley-Davidson FXFB Fat Bob 107 Base
2018-2019 Harley-Davidson FXFBS Fat Bob 114 Base
2018-2019 Harley-Davidson FXLR Low Rider 107 Base
2015-2019 Harley-Davidson XG500 Street 500 Base
2015-2019 Harley-Davidson XG750 Street 750 Base
2018-2019 Harley-Davidson XG750A Street Rod Base
2009-2011 Husqvarna TC250 Base
2009-2012 Husqvarna TE250 Base
2012 Husqvarna TE310 Base
2010-2012 Husqvarna TXC 250 Base
2012 Husqvarna TXC 310 Base
2003-2007 Kawasaki JT1200 STX-12F Base
2009-2010 Kawasaki JT1500 STX Base
2004-2016 Kawasaki JT1500 STX-15F Base
2007-2016 Kawasaki JT1500 Ultra LX Base
2005-2006 Kawasaki Z750S Base
1993 Kawasaki ZR1100 Base
2016 Kawasaki ZR800 Z800 ABS Base
1999-2000 Kawasaki ZRX1100 Base
2001-2005 Kawasaki ZRX1200 Base
1995-1997 Kawasaki ZX1100 GPZ Base
1996 Kawasaki ZX1100 GPZ ABS Base
1990-2001 Kawasaki ZX1100 Ninja ZX-11 Base
2001-2005 Kawasaki ZX1200 Ninja ZX-12R Base
1990-1997 Kawasaki ZX600 Ninja 600R Base
1990-2002 Kawasaki ZX600 Ninja ZX-6 Base
1995-2002,2007-2012 Kawasaki ZX600 Ninja ZX-6R Base
2003-2005 Kawasaki ZX600 Ninja ZX6-RR Base
2003-2006,2013-2019 Kawasaki ZX636 Ninja ZX-6R Base
2015 Kawasaki ZX636 Ninja ZX-6R 30th Anniversary Base
2013-2017,2019 Kawasaki ZX636 Ninja ZX-6R ABS Base
2015 Kawasaki ZX636 Ninja ZX-6R ABS 30th Anniversary Base
1991-1995 Kawasaki ZX750 Ninja ZX-7 Base
1991-1995 Kawasaki ZX750 Ninja ZX-7R Base
1994-2003 Kawasaki ZX900 Ninja ZX-9R Base
2003-2008 Kawasaki ZZR 600 Base
2002-2005 Kawasaki ZZR1200 Base
2013 KTM 250 SX-F Base
2013 MV Agusta Brutale 1090 ABS Base
2012 MV Agusta Brutale 1090R Base
2013 MV Agusta Brutale 1090R ABS Base
2012 MV Agusta Brutale 1090RR Base
2013 MV Agusta Brutale 1090RR ABS Base
2007 MV Agusta Brutale 910 R Base
2010-2011 MV Agusta Brutale 990R Base
2010-2011 MV Agusta F4 Base
2013 MV Agusta F4 ABS Base
2009 MV Agusta F4 RR 312 1078 Base
2006 MV Agusta F4-1000 S Base
2006 MV Agusta F4-1000 S 1+1 Base
2000-2002 MV Agusta F4-S Base
2001-2002 MV Agusta F4-S 1+1 Base
2013 MV Agusta F4R ABS Base
2007-2009 Piaggio MP3 250 Base
2013-2014 Polaris Ranger 900 XP Base
2012-2013 Polaris Ranger RZR 570 Base
2013 Polaris Ranger RZR 570 EPS Trail LE Base
2013 Polaris Ranger RZR XP 4 900 Base
2012-2013 Polaris Ranger RZR XP 4 900 EPS LE Base
2011-2013 Polaris Ranger RZR XP 900 Base
2013 Polaris Ranger RZR XP 900 EPS LE Base
2013 Polaris Ranger RZR XP 900 EPS Walker Evans LE Base
2013 Polaris Ranger RZR XP 900 HO Jagged X Edition Base
2012-2013 Polaris Ranger RZR XP 900 LE Base
2001-2007 Suzuki DR-Z250 Base
1994-1999 Suzuki DR350 Base
1994-1999 Suzuki DR350SE Base
1996-2003 Suzuki GSF600S Bandit Base
2001-2006 Suzuki GSX-R1000 Base
1993-1998 Suzuki GSX-R1100 Base
1992-1993,1997-2007 Suzuki GSX-R600 Base
1993-2009 Suzuki GSX-R750 Base
1999-2007 Suzuki GSX1300R Hayabusa Base
2006 Suzuki GSX1300R Hayabusa Limited Edition Base
1996-2006 Suzuki GSX600F Katana Base
1999-2006 Suzuki GSX750F Katana Base
1994-1996 Suzuki RF600 Base
1994-1997 Suzuki RF900 Base
1998-2003 Suzuki TL1000R Base
1997-2001 Suzuki TL1000S Base
2018 Textron Wildcat XX Base
2011 TM SMX450F Base
2003-2004 Triumph Daytona 600 Base
2005 Triumph Daytona 650 Base
2006-2014,2016 Triumph Daytona 675 Base
2015 Triumph Daytona 675 ABS Base
2011-2014,2016-2017 Triumph Daytona 675 R Base
2015 Triumph Daytona 675 R ABS Base
2002-2004 Triumph Daytona 955i Base
2002-2005 Triumph Speed Four Base
2002-2004,2007-2008 Triumph Speed Triple Base
2002-2004 Triumph Sprint RS Base
2002-2010 Triumph Sprint ST Base
2008-2013 Triumph Street Triple 675 Base
2014-2016 Triumph Street Triple ABS Base
2009-2013,2017 Triumph Street Triple R Base
2014-2016 Triumph Street Triple R ABS Base
2007-2010 Triumph Tiger Base
2011 Triumph Tiger 800 Base
2011-2014 Triumph Tiger 800 ABS Base
2011,2014-2016 Triumph Tiger 800 XC Base
2011-2013 Triumph Tiger 800 XC ABS Base
2016-2017 Triumph Tiger 800 XCA Base
2015-2017 Triumph Tiger 800 XCx Base
2015-2017 Triumph Tiger 800 XR Base
2016-2017 Triumph Tiger 800 XRT Base
2015-2017 Triumph Tiger 800 XRx Base
2000-2003 Triumph TT600 Base
2018 Yamaha ELT1050 210 FSH Base
2018 Yamaha ELT1050 210 FSH Deluxe Base
2018 Yamaha ELT1050 210 FSH Sport Base
2017-2019 Yamaha EX1050 EX Base
2017-2019 Yamaha EX1050 EX Deluxe Base
2017-2019 Yamaha EX1050 EX Sport Base
2019 Yamaha EX1050 EXR Base
2008-2010 Yamaha FAT1100 212SS Base
2008-2010 Yamaha FAT1100 212X Base
2006-2011 Yamaha FRT1100 AR210 Base
2006-2007 Yamaha FRT1100 SR210 Base
2006-2007 Yamaha FRT1100A SX210 Base
2008-2011 Yamaha FRT1100B SX210 Base
2008-2014 Yamaha FX10 FX Nytro Base
2003-2004 Yamaha FX1000 FX140 Base

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About K2 Industries

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Customer Reviews

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Let customers speak for us

from 199 reviews
Well worth it.

Just bought these clears for my mk7 and love them already. took under a hour to install and i feel like it was a much needed addition for my car. only thing i will say is if you buy them be aware that you have to take your reverse bulb out of your stock tail lights and put them into these (takes 30 seconds to get them out and put them in these new ones) follow my ig: dstagetwo ;)

Dawson Issac
VW MK7 Golf GTI Chrome/Clear LED Tail Lights (2012 - 2017)
Rear lights bmw e90

Absolutely incredible variants of modifications for lights, gadgets etc for all car specs!

Wolfy01
BMW 3 Series E90 Sedan Red / Chrome / Black LED Tail Lights (2005 - 2008)
Completely changed the look!

I love these headlights, I wouldn’t hesitate to buy them again if I got another truck my body style. Best looking headlights I’ve seen that they make for this truck.

Coltan Vice
Spec-D Full LED Headlights Chevy Silverado 1500 (2019-2021) Sequential LED Black Housing w/ Clear or Smoked Lens
Great purchase

Shopped on time, easy install, looks great! Would highly recommend!

Brittney Burriss
BMW 3 Series G20 DRL Module (2019+)

VW Golf 6th Gen Mk6 Hatchback LED Tail Lights (2008 - 2014)

Layne Coy
VW Golf 6th Gen Mk6 Hatchback LED Tail Lights (2008 - 2014)
Great little side marker!

GreEasy to install on my E46 M3 and it looks more modern with the LED lighting. Yes, the light does stay on for a minute (or two) after I un/lock it but it actually looks pretty cool. Definitely an easy modification to update your car's look.

Beemer Boii
BMW E38 7-Series E46 M3 Crystal Light Bar Clear/Smoke Lens Amber/White LED Side Marker Light (1995-2006)

If you buy these you have to program them to your car I have 06 325i

Steven Morales-Gonzalez
Spec-D Projector Headlights BMW 325i 330i 335i E90 Sedan (06-11) 3D Dual Iced LED - Black / Chrome / Tinted
50th Anniversary Carbon Fiber Roundel

Loved the product, great quality

Neville Mitchell
BMW Roundel Emblem Covers - Full Carbon Fiber 50th Anniversary Style

BMW E36 Sedan Custom Clear Tail Lights V3 (1992-1999)

Jay Morey
BMW E36 Sedan Custom Clear Tail Lights V3 (1992-1999)
Carbon Fiber Airducts

Glad that K2 offer this product. One of many carbon fiber parts that I want to add to my G80.

Joe Kelley
BMW 3/4 Series G80 G81 G82 G83 Carbon Fiber Air Ducts (2019 - 2024)
Blue DRL

A complete fresh look for my F20 with this blue DRL. I'm happy with the result with this upgrade!

Marion Khun
BMW 1 Series F20/F21 DRL Module (2015-2019)
Nice Upgrade

Fits like a glove! A sudtle race-inspired look for my G82.

Brandon Edwards
BMW 4 Series M4 G82 KB Style Carbon Fiber Spoiler (2021+)
Amazing Taillights

I absolutely love the product, they fit perfectly as if they are oem. I love the attention to detail

Sakir Hall
BMW 3 Series E90 Upgraded LED Tail Lights (2009 - 2011)
Beautiful Spoiler

The carbon fiber look is flawless! Had it installed for a week now and so far it's sturdy during high speeds. Worth the money, worth the wait!

Matthew Medina
BMW 2 Series G42 MP Style Carbon Fiber Spoiler (2022+)
Premium Interior Touch

This carbon fiber HUD cover added a high-end, sporty feel to my X4 M’s interior. The fit is precise, and the carbon fiber finish looks stunning. Small upgrade, big impact!

Vernon Mitchell
Toyota Supra Mk5 DRL Module (2019+)

Frequently Asked Questions

Why Buy from K2 Industries

What makes K2 Industries more than just a parts supplier?

We’re a team of USA-based car enthusiasts committed to helping you get your build right the first time. With our deep product knowledge and close relationships with trusted manufacturers, we ensure you receive high-quality parts that perform. We’re here to support you before, during, and after your purchase, providing personalized advice, part compatibility checks, and responsive customer service. When you buy from us, you’re joining a community that cares as much about your car as you do.

How do I know which parts are best for my car and goals?

Answer: Our team can provide personalized mod plans to match your performance and style goals. Whether you’re building for speed, aesthetics, or both, we’ll help you select the right parts for your vision. Contact us to discuss your project!

Do You Have Financing Options?

Answer: Yes, we offer flexible financing options to make it easier for you to upgrade your vehicle without paying the full amount upfront. Choose our financing option at checkout to split your purchase into manageable payments, so you can start your build now and pay over time.

Visit our FULL FAQ Page

https://www.k2-industries.com/a/faq

Shipping

Do you ship overseas?

Yes, we ship all over the world. Shipping costs will apply, and will be added at checkout. We run discounts and promotions all year, so stay tuned for exclusive deals.

How long will it take to receive my order?

It depends on where you are. Orders processed here will take 5-7 business days to arrive. Overseas deliveries can take anywhere from 7-16 days. Delivery details will be provided in your confirmation email.

Other

Any question?

You can contact us through our contact page! We will be happy to assist you.