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Autolite Racing Spark Plugs (03-04 Cobra; 07-14 GT500)

Market Price $44.99 You Save 11% ($5.00)
Our Price

$39.99

FREE Shipping on orders over $49
  • Item 525503
  • MPN# AR103

In Stock Ships same business day. Choose options to add to cart

Features & Details

  • Perfect for Boost & Nitrous Applications
  • Chromium Nickel Alloy Tip for a Constant Stable Spark
  • Improves Fuel Economy and Lower Emissions
  • 1 Heat Range Colder
  • Autolite Part# AR103
  • 14mm Thread Pattern
  • Spark Plug Reach 0.708"
  • Fits 2003-2004 SVT Cobra and 2007-2014 Shelby GT500
  • Sold as a Set of 8
High Performance. Keeping your Mustangs nitrous or force inducted engine running smoothly and efficiently is important, that is why it is critical to choose the correct spark plugs for your application. These Autolite Racing Hi-Performance Spark Plugs are one heat range colder than stock making them perfect for supercharged Mustangs that are running additional boost.

Superior Materials. Autolite Racing Hi-Performance Spark Plugs feature a copper core electrode for its superior conductivity and a chromium nickel alloy tip for a constant stable spark, perfect for keeping your Mustangs high-performance engine running at it's peak.

Application. This set of eight (8) One Heat Range Cooler Autolite Racing 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

What's in the Box
  • (8) Spark Plugs
Installation Info
Tech Specs
Will it fit my Mustang?
  • Cobra - 03, 04
  • GT500 - 07, 08, 09, 10, 11, 12, 13, 14

People Who Bought This Item Also Bought

Most Helpful Reviews

5/5
Yes!!!!!!

Very good product would recommend for any one running a lot of boost in ther car

Helpful (1)

4/5
1998 cobra 03 cobra long block

The plugs when in nice and easy seem like my car idles a whole lot better clean burn smell to exhaust

Helpful (1)

Overall Rating 4.7 out of 5 stars
Read All 3 Reviews

Customer Photos

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1 Questions / 1 Answers

Ask a Question

My Shelby book refers me to the emission control decal to get Spark Plug Gap. WELL; it refers me back to the Shelby Book.I see you mention Spark Plug Reach....Is this actually the GAP? I have a 2007 GT5OO.I have the AP103 Plugs...THANKS...

crazycharlie

  • Spark plug gap and spark plug reach are slightly different. Spark plug gap would be a measurement of distance between the center and side electrodes on the plug, whereas the spark plug reach is the length of the plugs threads.

    James B

Helpful (0)

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Customer Reviews (3) Write a Review

Overall Rating 4.7

out of 5 stars

Installation Time:Less than 1 Hour

  • Performance Gain 4.333333 4.3
  • Fit 5 5



  • 4/5

    Installation Time: Less than 1 Hour

    December 14, 2015

    1998 cobra 03 cobra long block

    The plugs when in nice and easy seem like my car idles a whole lot better clean burn smell to exhaust

    Eric

    Year: 1998 Submodel: Cobra

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    November 19, 2015

    Yes!!!!!!

    Very good product would recommend for any one running a lot of boost in ther car

    Tmoney

    Year: 2008 Submodel: GT500 Colorado

    Helpful (1)

  • 5/5

    Installation Time: Less than 1 Hour

    October 06, 2014

    Dyno day

    Put these in my cobra before i threw it on the dyno. Ran perfect. Would use these for a long term spark plug if you daily drive ect. but they are the best to use for getting the highest dyno numbers.

    KellyS

    Year: 2003 Submodel: Cobra NJ

    Helpful (0)

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