Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 11 - Jul 16
Promo Codes Available:
For Your Every Summer RSVP, with Code: SUMMER15
Description
NGK IX Iridium Spark Plug Box of 4 (TR6IX)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.
- RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs
- Trivalent metal plating for superior anti-corrosion and anti-seizing properties
- Outstanding acceleration, high fuel efficiency and durability
- Fine iridium tip ensures durable and consistent spark
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2000 | Aston Martin | DB7 | Vantage |
| 2000 | Aston Martin | DB7 | Vantage Volante |
| 2009-2015 | Cadillac | CTS | V |
| 2014-2015 | Chevrolet | Camaro | Z/28 |
| 2012-2015 | Chevrolet | Camaro | ZL1 |
| 2013 | Chevrolet | Corvette | 427 |
| 2008 | Chevrolet | Corvette | 427 Limited Edition Z06 |
| 2006-2013 | Chevrolet | Corvette | Z06 |
| 2011 | Chevrolet | Corvette | Z06 Carbon |
| 2009-2013 | Chevrolet | Corvette | ZR1 |
| 1996-2008,2010-2011 | Ford | Crown Victoria | Base |
| 2006-2009 | Ford | Crown Victoria | Fleet |
| 2002-2009 | Ford | Crown Victoria | LWB |
| 1997-2011 | Ford | Crown Victoria | LX |
| 2004 | Ford | Crown Victoria | LX Sport |
| 1996-2005,2008-2011 | Ford | Crown Victoria | Police Interceptor |
| 1996-2005 | Ford | Crown Victoria | S |
| 2005 | Ford | Crown Victoria | Special Edition |
| 2002-2003 | Ford | F-150 | Harley-Davidson Edition |
| 1999-2003 | Ford | F-150 | Lightning |
| 2004 | Ford | F-150 Heritage | SVT Lightning |
| 2005-2006 | Ford | GT | Base |
| 2007-2014 | Ford | Mustang | Shelby GT500 |
| 2008-2009 | Ford | Mustang | Shelby GT500KR |
| 2001-2004 | Ford | Ranger | Edge |
| 2004 | Ford | Ranger | Tremor |
| 1999-2004 | Ford | Ranger | XL |
| 1999-2004 | Ford | Ranger | XLT |
| 1999-2004 | Ford | Taurus | LX |
| 1999-2006 | Ford | Taurus | SE |
| 2000,2003 | Ford | Taurus | SE Comfort |
| 2004-2006 | Ford | Taurus | SEL |
| 2000-2004 | Ford | Taurus | SES |
| 2000 | Ford | Taurus | SVG |
| 2006-2007 | Lincoln | Town Car | Designer Series |
| 2006-2010 | Lincoln | Town Car | Executive |
| 2006-2011 | Lincoln | Town Car | Executive L |
| 2006 | Lincoln | Town Car | Protection Series |
| 2006-2007 | Lincoln | Town Car | Signature |
| 2006-2011 | Lincoln | Town Car | Signature L |
| 2006-2011 | Lincoln | Town Car | Signature Limited |
| 2001 | Mazda | B3000 | DS |
| 1999-2001 | Mazda | B3000 | SE |
| 2000 | Mazda | B3000 | SX |
| 1999-2000 | Mazda | B3000 | Troy Lee |
| 2006-2008 | Mercury | Grand Marquis | GS |
| 2006-2011 | Mercury | Grand Marquis | LS |
| 2003-2005 | Mercury | Sable | GS |
| 2001 | Mercury | Sable | LS |
| 1989 | Pontiac | Firebird | Trans Am |
| 1989 | Pontiac | Firebird | Trans Am GTA SE |
| 1990 | Pontiac | Grand Prix | Mclaren |
| 1989 | Pontiac | Grand Prix | SE |
| 1990 | Pontiac | Grand Prix | STE |
| 1968-1971 | Rover | 2000 | Base |
| 1968-1971 | Rover | 2000 | TC |
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
4.4 ★★★★★
Based on 2400 reviews
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Product Reviews
★★★★★ 5
Best Quality Socks & Great Thickness Plus Comfort
Size: Medium, Color: (001) Black / Black / Castlerock
I love these. They do not slip away from foot. The value for a good pack of socks was worth it. Has a good thick quality. They look clean and nice. Their stretch is good to get on and then molds to foot.
Have noticed these socks have changed two times since buying. First they were slightly lighter color gray- then a darker gray but both had good quality and thickness. I am sure these are very durable but unfortunately I can not speak fully to this as the horrible steel toe shoes I have to wear rip everything apart. But if I had good shoes and everyday use of these I know they would stay good for so much longer than 6months.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 7, 2025
★★★★★ 5
Best socks ever
Size: Large, Color: (100) White / White / Mod Gray
Best athletic socks I’ve bought. I usually buy UA socks anyway and these are the best. Super soft and comfy. Fit snug and my feet don’t slide around in them.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 9, 2026
★★★★★ 5
Much much better than the standard sock
Size: X-Large, Color: (001) Black / Black / Castlerock
These socks are superb. Lots of padding in the right places, snug where it should be snug & loose where you don't want it to bind. They are marked with an 'L' for left foot, & 'R' for the right foot (it makes a difference in the fit being perfect. They stay up on your heel & don't slide down
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 20, 2026
★★★★★ 4
4 lefts vs 2 rights
Size: Medium, Color: (001) Black / Black / Castlerock, Size: Medium, Color: (001) Black / Black / Castlerock
I ordered a set of three. I ended up with four left socks and two right socks lol. Granted it doesn’t matter unless you’re OCD. JEEZ.
Love the socks but not the attention to detail the sock company did on matching left/right marked socks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 28, 2026
★★★★★ 5
My favorite socks
Size: Medium, Color: (001) Black / Black / Castlerock
I love love, love the left and right socks one has an L one has an R and they fit so well and they’re so comfy for running jogging or walking. They are my favorite socks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 8, 2026
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