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Granatelli Motor Sports 4V Hot-Street Coil Packs (99-04 Cobra, Mach 1)

Item 65011
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Ship to: Ashburn - 20149
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      Product Information

      Features, Description, Reviews, Specs & Installation


      • Perfect for Mustangs with Minor Bolt-Ons.
      • More Horsepower and Torque.
      • Increased Fuel Economy.
      • Kit Includes (8) 40k Coil Packs.
      • Designed for 99-04 SVT Cobra & 03-04 MACH 1's.


      More Horsepower and Torque. The Hot Street Series 40,000 volt coils provide 20,000 more volts then stock OEM factory coils to help produce more power from your modern modular motor and are a perfect match for stock engines or mustangs with minor performance upgrades.

      Better Fuel Economy. A hotter spark burns fuel more completely releasing all it's energy translating into better fuel economy and power.

      Application. These Granatelli Motor Sports 4 valve Hot Street Coil Packs are designed for use with the 1999-2004 SVT Cobra and 2003-2004 MACH 1 Mustangs .

      Fitment: 1999 2001 2003 2004 Details

      MPN# 25-4001

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (13)

      Write a Review

      Ratings Summary

      4.5 out of 5 overall rating from 13 customers

      Installation Time: Afternoon

      Installation Cost: $100-$250

      • February 18, 2018

        5 2003 Cobra - AlexV

        Easy and fast process.

        I have a 2003 10 year anniversary cobra fairly stock. Changed the o2 sensors so decided to replace coils and plugs. Easy process when doing both. Took a little over an hour and easy to do. Happy to say that you could feel the difference when finished.

        Helpful (4)
      • December 04, 2017

        5 2003 Mach 1 - RobertS Installation Time: Less than 1 Hour

        2003 mustang mach 1

        I really didn't realize how bad my mach was running until I installed these coils. Can't describe the feeling.Runs and idles like a sewing machine. Do yourself and your engine a favor and get these coils. Worth every penny.

        Helpful (7)
      • March 26, 2014

        1 2003 Mach 1 - Courtney924 Installation Time: Shop Install Installation Cost: 0-$100

        Only 8 months old and two are bad already!

        I purchased this set exactly 8 months ago for my Mach 1 and two are bad already, leaving my Mach misfiring miserably. I noticed a decent response while they worked, but for the price I'm livid that they didn't last longer. Definitely wouldn't recommend this product- they're lousy! I usually don't doubt anything I buy from AM, but an 8 month life span for a $300 coil set is ridiculous.

        Helpful (9)
      • January 22, 2014

        4 2001 Cobra - Gun4Hire Installation Time: Shop Install Installation Cost: $100-$250

        This product is alright

        Had problem fitting boots over plug ended up having to take them the the SpeedLab in Albuq.N.M. After becoming a few hundred bucks poorer,my 2001 Cobra was once again eat riceburners

        Helpful (7)
      • March 26, 2013

        5 2004 GT - allmotor Installation Time: Less than 1 Hour

        Hot street coils

        i just installed these on my car ,took about an hour working slowly. the first thing i noticed was that the car had better throttle response,then when i drove it it felt much peppier & nimble. i got i just to nail it from a stoplight with tracion control off and it rev'd so fast it smoked the tire for about a block long,these things work good im happy with them.As far as the stories of them failing time will tell but so far no complaints,nice bang for the buck! thanks AM.

        Helpful (8)
      • February 20, 2013

        5 2003 Mach 1 - RobertDothan Installation Time: Less than 1 Hour

        Noticeable acceleration increase

        Installed the coil packs along with the NGK Iridium IX Performance Spark Plugs. Smooth...

        Helpful (7)
      • October 08, 2012

        5 2003 Mach 1 - Primercoupe Installation Time: Less than 1 Hour

        Night and Day difference!

        Complete night and day difference between the GMS 4v Hot-Street Coil packs and OEM. I had a coil pack going bad but couldn't pin point which one, installed the GMS coil packs and WOW what a difference. Instant grin on my face(and I swear the Pony in my grille was smiling too) the first time my foot hit the floor. This product has a great fit, produces a great power gain and is well worth the money! I definitely recommend this product for everyone.

        Helpful (11)
      • April 27, 2012

        4 2003 Cobra - 03cobrah Installation Time: Less than 1 Hour

        Definetaly worth it!

        Noticed smooth acceleration right away. Fitments pretty good.

        Helpful (7)
      • March 22, 2012

        5 2004 Mach 1 - BeastMach1 Installation Time: Afternoon

        Granatelli coils for Mach 1

        The coils worked great seems to be about a 10 hp improvement from stock. GreatB

        Helpful (7)
      • August 09, 2011

        5 2004 Mach 1 - James

        Wake Up!

        Great Coils, put these on my Mach 1 and wow, get you pony running, easy install, got a 4 Valve 2 Over Stang, get these coils and wake that Pony up!

        Helpful (9)

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      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (8) Coil Packs

      Tech Specs

      Will It Fit My Mustang

      • Cobra - 99, 01, 03, 04
      • Mach 1 - 03, 04

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