Free Shipping On Orders Over $49. Details

Talk to a Mustang Expert
Mon - Sun, 8:30 AM EST - 11:00 PM EST
Win A 700+ HP 2018 RTR Mustang Enter Now!

GMS 4V Pro-Series Coil Pack (99-04 Cobra, Mach 1)

Market Price $678.00 You Save 10% ($67.15)
Starting At


FREE Shipping
  • Item 65007
  • MPN# 28-1705CP

Local Install Shops

Quoted installation from $125

View 3 Shops

near 19355 (change)

Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.

Will this fit your Mustang?

Ship to: ASHBURN - 20146
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

    Features & Details

    • Gain Up to 35HP.
    • Direct Replacement.
    • Up to 400% More Voltage.
    • Simple 1 Hour Install.
    • Perfect for Forced Induction Applications.
    • Fits 99-04 Mustang Cobra & Mach 1.
    Gain Up to 35HP. If you have a blown or modified setup in your New Edge Mustang, upgrading to a Granatelli Coil-on-Plug kit will deliver the spark your Pony needs to get the most from your mods. Your weak OEM coils don't deliver a strong enough spark to your plugs to ensure you're getting the most power possible from your engine, especially once you've added high performance parts. This kit adds up to 15HP on naturally aspirated Mustangs and an impressive 35HP on turbo or supercharger setups.

    Up to 400% More Voltage. Your stock coils deliver 20,000 volts, versus the GMS coils which are rated at 60,000 volts. And this kit features a no-resistance connector cable design so all of that voltage is being delivered where it counts.

    Complete Kit. This complete kit includes all hardware necessary for installation including the 8 coil packs, connector cables, and stainless snap lock plug connectors.

    Easy Installation. Upgrading your coils is easy with this kit, which is OBD-II safe and a direct replacement for your OEM setup. You'll enjoy more power, improved throttle response, and even better fuel economy with an hour or less install time using basic hand tools from this GMS Coil Plug Kit.

    Application. The Granatelli Coil-on-plug upgrade kit is designed for 1999-2004 SVT Cobra & MACH1 Mustangs.

    Fitment: 1999 2001 2003 2004 Details

    What's in the Box
    Hardware included:
    • (8) Eight Coil Packs (Coil, connector, boot, and spacer plate)
    Installation Info
    Tech Specs
    Will it fit my Mustang?

    Customer Photos

    You Might Also Like

    1 Questions / 1 Answers

    Ask a Question

    where are these made


    • The GMS 4V Pro-Series Coil Pack along with other GMS products are made out of the facilityin California. 


    Helpful (0)

    More Products You Might Like

    Customer Reviews (3) Write a Review

    Overall Rating 2.3

    out of 5 stars

    Installation Time:Less than 1 Hour

    • Performance Gain 2 2
    • Fit 3 3

    • 1/5

      Installation Time: Less than 1 Hour

      July 19, 2012

      less then 300 miles.

      Installed these and they worked great for a short while went to take a friend from out of town for a rip and car started missing just out of my drive way did a code scan came up missfire on cylinder 2 just to check we changed that coil over to cylinder one and cleared the code ran it again same code cylinder 1 that was with less then 300 miles canging back to my stock coils.


      Year: 2003 Submodel: Mach 1

      Helpful (3)

    • 1/5

      Installation Time: Less than 1 Hour

      February 06, 2012

      GMS 4V Pro-Series Coil Pack

      The coil pack worked great the first 1500 miles great gain in hp after 1500mi the coil pack burned one at a time after the third coil pack burned out i just pulled them all out now i haft to put my stock coil packs back in and i'm out 500.00 i wouldn't recommend anyone tobuy these coil packs you will be buying trouble; furthermore, if you continue to drive on cylinder misfire due to a burnt out coil pack it will only lead to more problems and other parts to replace.


      Year: 1999 Submodel: Cobra Central Florida

      Helpful (5)

      • Response from AmericanMuscle

        I am very sorry to hear your coil pack failed after such a short period of time. I suggest that you contact GMS directly at 805-486-6644 as they do have a 90-day warranty on the majority of their performance parts and they may be able to assist you with this issue.

        Lisa, Content Specialist

    • 5/5

      June 22, 2010

      wake up

      woke car right up got .3 seconds out of in 1/4 had stage 2 heads and cams done felt like it was missing something and this was it 60,0000 is the way to go o and got an extra 10 hp out of 125 shot worth every penny

      Zac T

      Helpful (12)

    Related Mustang Categories