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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 29 - Aug 3
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
NGK Iridium IX Spark Plug Box of 4 (LFR6AIX)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
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 |
|---|---|---|---|
| 2015-2020 | Dodge | Challenger | SRT Hellcat |
| 2015-2020 | Dodge | Charger | SRT Hellcat |
| 2013-2014 | Hyundai | Genesis Coupe | 2.0T |
| 2013-2014 | Hyundai | Genesis Coupe | 2.0T Premium |
| 2013-2014 | Hyundai | Genesis Coupe | 2.0T R-Spec |
| 2011-2012 | Land Rover | LR2 | Base |
| 2008-2012 | Land Rover | LR2 | HSE |
| 2011-2012 | Land Rover | LR2 | HSE Lux |
| 2008 | Land Rover | LR2 | SE |
| 2003-2005 | Mercedes-Benz | C230 | Kompressor |
| 2003-2006 | Mercedes-Benz | CL55 AMG | Base |
| 2006 | Mercedes-Benz | CLS55 AMG | Base |
| 2003-2006 | Mercedes-Benz | E55 AMG | Base |
| 2005-2011 | Mercedes-Benz | G55 AMG | Base |
| 2004-2006 | Mercedes-Benz | S55 AMG | Base |
| 2003 | Mercedes-Benz | S55 AMG | Kompressor |
| 2004-2008 | Mercedes-Benz | SL55 AMG | Base |
| 2003 | Mercedes-Benz | SL55 AMG | Kompressor |
| 2005-2009 | Mercedes-Benz | SLR McLaren | Base |
| 2006-2012 | Mitsubishi | Eclipse | GS |
| 2010-2012 | Mitsubishi | Eclipse | GS Sport |
| 2008,2012 | Mitsubishi | Eclipse | SE |
| 2007-2011 | Mitsubishi | Eclipse | Spyder GS |
| 2012 | Mitsubishi | Eclipse | Spyder GS Sport |
| 2012 | Mitsubishi | Eclipse | Spyder SE |
| 2004-2008 | Mitsubishi | Galant | DE |
| 2004-2012 | Mitsubishi | Galant | ES |
| 2011-2012 | Mitsubishi | Galant | FE |
| 2005-2007,2010-2012 | Mitsubishi | Galant | SE |
| 2009 | Mitsubishi | Galant | Sport Edition |
| 2004-2006 | Mitsubishi | Lancer | Ralliart |
| 2004 | Mitsubishi | Lancer | Sportback |
| 2004 | Mitsubishi | Lancer | Sportback Ralliart |
| 2005-2006 | Mitsubishi | Outlander | Limited |
| 2004-2006 | Mitsubishi | Outlander | LS |
| 2006 | Mitsubishi | Outlander | SE |
| 2004-2005 | Mitsubishi | Outlander | XLS |
| 2006 | Saab | 9-2X | Aero |
| 2006-2007 | Subaru | B9 Tribeca | Base |
| 2006-2007 | Subaru | B9 Tribeca | Limited |
| 2004-2006 | Subaru | Baja | Turbo |
| 2008 | Subaru | Forester | Sports 2.5 XT |
| 2004-2005,2009 | Subaru | Forester | XT |
| 2006-2010 | Subaru | Forester | XT Limited |
| 2005,2010-2013 | Subaru | Forester | XT Premium |
| 2011-2013 | Subaru | Forester | XT Touring |
| 2009-2010 | Subaru | Impreza | 2.5 GT |
| 2006-2014 | Subaru | Impreza | WRX |
| 2006-2007,2010-2014 | Subaru | Impreza | WRX Limited |
| 2009-2014 | Subaru | Impreza | WRX Premium |
| 2004-2014 | Subaru | Impreza | WRX STI |
| 2007,2011-2014 | Subaru | Impreza | WRX STI Limited |
| 2010 | Subaru | Impreza | WRX STI Special Edition |
| 2006-2007 | Subaru | Impreza | WRX TR |
| 2010-2012 | Subaru | Legacy | 2.5GT |
| 2009 | Subaru | Legacy | 3.0 R |
| 2008-2009 | Subaru | Legacy | 3.0 R Limited |
| 2005-2006 | Subaru | Legacy | GT |
| 2005,2007-2009 | Subaru | Legacy | GT Limited |
| 2006-2009 | Subaru | Legacy | GT spec.B |
| 2009 | Subaru | Outback | 3.0 R Limited |
| 2005-2006 | Subaru | Outback | R |
| 2005-2008 | Subaru | Outback | R L.L. Bean Edition |
| 2006 | Subaru | Outback | R VDC Limited |
| 2005 | Subaru | Outback | VDC Limited |
| 2005-2006 | Subaru | Outback | XT |
| 2005-2009 | Subaru | Outback | XT Limited |
| 2008-2009 | Subaru | Tribeca | Base |
| 2008-2009 | Subaru | Tribeca | Limited |
| 2015-2018 | Subaru | WRX STI | Base |
| 2015 | Subaru | WRX STI | Launch Edition |
| 2015-2018 | Subaru | WRX STI | Limited |
| 2016 | Subaru | WRX STI | Series.HyperBlue |
| 2008-2013 | Volvo | C30 | T5 |
| 2008-2013 | Volvo | C30 | T5 R-Design |
| 2006-2013 | Volvo | C70 | T5 |
| 2006-2009,2011 | Volvo | S40 | T5 |
| 2010-2011 | Volvo | S40 | T5 R-Design |
| 2004-2007 | Volvo | S60 | R |
| 2005-2009 | Volvo | S60 | T5 |
| 2011-2012 | Volvo | S60 | T6 |
| 2007-2011 | Volvo | S80 | 3.2 |
| 2008-2011 | Volvo | S80 | T6 |
| 2005-2009,2011 | Volvo | V50 | T5 |
| 2010-2011 | Volvo | V50 | T5 R-Design |
| 2008-2010 | Volvo | V70 | 3.2 |
| 2004-2007 | Volvo | V70 | R |
| 2005 | Volvo | V70 | T5 |
| 2010-2011 | Volvo | XC60 | 3.2 |
| 2011 | Volvo | XC60 | 3.2 R-Design |
| 2010-2011 | Volvo | XC60 | T6 |
| 2010-2011 | Volvo | XC60 | T6 R-Design |
| 2008-2011 | Volvo | XC70 | 3.2 |
| 2009-2011 | Volvo | XC70 | T6 |
| 2007-2011 | Volvo | XC90 | 3.2 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.0 ★★★★★
Based on 27 reviews
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Product Reviews
★★★★★ 5
Great no shows for people with larger feet
Size: Large, Color: (001) Black / Black / Castlerock
Some of my favorite socks!! Great quality, fit, and material. I love that they don't slip down in my shoes, especially considering I have larger feet. I also love that Under Armour offers larger sizes in their socks considering everyone in our household has much larger feet than others.
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Reviewed in the United States on May 3, 2026
★★★★★ 5
Best liner socks EVER
Size: Medium, Color: (348) Silica Green / Silica Green / Hydro Green
I have them in every color and used to get them from Sams, but they stopped selling them and I was lucky to find them on Amazon. Got all colors again. They stay, it's all I'm gonna say! And don't show in any of my tennis shoes. Absolutely love them and wear them until they get holes. They last a LONG time too. They're on the thin side and my foot loves them because they tend to get hot. There's no shrinking, they wash great with exception of the white ones I couldn't manage to keep white - they turned a bit greyish.
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Reviewed in the United States on January 4, 2026
★★★★★ 5
Great socks
Size: Medium, Color: Pink - 647
Well-made and comfortable to wear. Great for golf and other outdoor activities. Like them because they do not show above shoes.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
These ACTUALLY stay put all day long - I was skeptical, but am so glad I took a chance on these
Size: Medium, Color: (014) Halo Gray / Halo Gray / Castlerock
I was so skeptical about whether these would stay on my feet all day without sliding down into my shoe - I’ve tried so many socks in the past with the silicone strip on the heel which failed.
I’ve owned these for a couple months now and they have never slipped down - they stay put all day! I love the variety of colors to choose from, and the value per pack is great since six pairs come per pack (I thought it was only three when I first purchased and was pleasantly surprised by the additional pairs). They also have perfect thickness - not too warm to wear during the summer months with sneakers; I live in a tropical climate, though, so I’m not sure how they will do in cooler climates. I’ve washed each pair once or twice and the color and quality of the silicone has stayed so far (knock on wood).
Overall: high recommend based on my experience so far!
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Reviewed in the United States on September 13, 2025
★★★★★ 5
Great fit!
Size: Medium, Color: (403) Washed Navy / Washed Navy / Blue Smoke
Great quality!
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Reviewed in the United States on May 15, 2026