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NGK Iridium IX Performance Spark Plugs - Heat Range 7 (03-04 Cobra; 07-14 GT500)

2 Reviews
Our Price

$89.99

(set of 8)
  • Item #64070
  • MPN#3690

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  • Market Price $99.99
  • You Save 10% ($10.00)
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Features
  • Perfect for increased boost
  • Iridium tip for a constant stable spark
  • Improves fuel economy and lower emissions
  • Heat Range: 7
  • NGK part# TR7IX; NGK stock# 3690
  • 14mm thread pattern
  • Spark plug reach 0.708"
  • Fits 2003-2004 SVT Cobra and 2007-2014 Shelby GT500
  • Sold as a set of 8
Description
High Performance. Keeping your Mustangs high performance engine running smoothly and efficiently is important, so routinely replace your old weak plugs with a new set of NGK Iridium IX Performance Spark Plugs for constant reliable spark power. The Iridium IX plugs from NGK will provide improved throttle response, fuel efficiency, lower emissions, and will reduce fouling.

Superior Materials. NGK Iridium IX Performance Spark Plugs feature a copper core electrode for its superior conductivity and an iridium tip (which is 6X harder than platinum) for it's extremely high melting point, perfect for keeping your Mustangs high-performance engine running at it's peak. And as an added bonus the Iridium IX plug features Trivalent Metal Plating for it's superior anti-corrosion and anti-seizing properties.

Application. This set of eight (8) One Heat Range Cooler NGK Iridium IX Performance Spark Plugs are specifically designed for the 2003-2004 SVT Cobra and 2007-2014 Shelby GT500 Mustangs that are running more boost.

Fitment: 2003 2004 2007 2008 2009 2010 2011 2012 2013 2014 Details

Won't fit? Add an exception

What's in the Box
  • (8) Spark Plugs
    Hardware included:
  • None Required
Installation Info
Will it fit my Mustang?
  • GT500 - 07, 08, 09, 10, 11, 12, 13, 14
  • Cobra - 03, 04

Most Helpful Reviews

4/5

Top 500 Contributor

Good product, easy install

Decided to change my plugs out at 30K miles. Old stock plugs had lots of carbon build up and looked pretty worn out. Getting the old plugs out and new ones in was a breeze, but I took my time so finished ...

Read More
Helpful (2)

5/5
spark plug

this is a great product I recommend this to every Cobra owner. you could tell the difference in this product

Helpful (0)

Read All 2 Reviews
Overall Rating 4.5 out of 5 stars

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Customer Reviews (2) Write a Review

Overall Rating 4.5

out of 5 stars

Installation Time:Less than 1 Hour

  • Performance Gain 4 4
  • Fit 5 5
  • Bang For Your Buck 4.5 4.5



  • 4/5

    Installation Time: Less than 1 Hour

    June 10, 2013

    Good product, easy install

    Decided to change my plugs out at 30K miles. Old stock plugs had lots of carbon build up and looked pretty worn out. Getting the old plugs out and new ones in was a breeze, but I took my time so finished it in about 2 hours. Didn't notice any performance gain, but acceleration is smooth. AM prices on these plugs is very competitive.

    Top 500 Contributor

    BigBearGT500

    Year: 2011 Model: GT500 Driving Style: Daily Driver 'Stangs I have owned: 1 Phoenix, AZ

    Helpful (2) (0)

  • 5/5

    Installation Time: Less than 1 Hour

    May 29, 2015

    spark plug

    this is a great product I recommend this to every Cobra owner. you could tell the difference in this product

    termi04

    Year: 2004 Model: Cobra Driving Style: Race 'Stangs I have owned: 2 Waco, TX

    Helpful (0) (0)

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