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NGK Iridium IX Spark Plugs; Heat Range 6 (03-04 Cobra; 07-14 GT500)

Item 525003
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Market Price $79.99 You Save 13% ($10.00)
Our Price

$69.99 (set of 8)

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Ship to: Ashburn - 20149
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation

      Features

      • Perfect for Stock Boost
      • Iridium Tip for a Constant Stable Spark
      • Improves Fuel Economy and Lower Emissions
      • Heat Range: 6
      • NGK Part# TR6IX; NGK Stock# 3689
      • 14mm Thread Pattern
      • Spark Plug Reach 0.690"
      • 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) NGK Iridium IX Performance "Heat Range 6" Spark Plugs are specifically designed for the 2003-2004 SVT Cobra and 2007-2014 Shelby GT500 Mustangs that are running stock boost.

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

      NGK 3689

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

      Installation & What's in the Box

      Installation Info

      Installation Time

      (approx) 2 Hours

      Difficulty Level:

      Light to Moderate mechanical skill required.

      Installation Guides

      What's in the Box

      • (8) Spark Plugs

      Tech Specs

      4.9

      Customer Reviews (100+)

        Reviews of NGK Ignition products have an average rating of 4.8 out of 5

          Questions & Answers

          10 More Questions

          Will It Fit My Mustang

          • Cobra - 03, 04
          • GT500 - 07, 08, 09, 10, 11, 12, 13, 14

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