Free Shipping On Orders Over $49. Details

Talk to a Mustang Enthusiast
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $6,000 In Store Credit Enter Now

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

Item 65007
Call a Mustang Enthusiast at 1-877-887-1105
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $724.99 You Save 12% ($83.74)
Our Price


FREE Shipping

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
In Stock

Ship to: Ashburn - 20149
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.

      Product Information

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


      • 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

      Granatelli Motor Sports 28-1705CP

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (4)

      Write a Review

      Ratings Summary

      2.0 out of 5 overall rating from 4 customers

      Installation Time: Less than 1 Hour

      • December 04, 2019

        1 2003 Cobra - HouaX Installation Time: Less than 1 Hour

        4v pro

        Stick with stock. These things fall apart. After changing out my plugs for the 2nd time, one of the lower end and top end of the wire came apart. Do not recommend it for anyone. Didn't see or feel any differents in power.

        Helpful (1)
      • July 19, 2012

        1 2003 Mach 1 - Ash03 Installation Time: Less than 1 Hour

        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.

        Helpful (14)
      • February 06, 2012

        1 1999 Cobra - MustangCobra1 Installation Time: Less than 1 Hour

        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.

        Helpful (16)
      • June 22, 2010

        5 - Zac T

        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

        Helpful (21)

      Questions & Answers (1 answers)

      1 Top Rated 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)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      Hardware included:
      • (8) Eight Coil Packs (Coil, connector, boot, and spacer plate)

      Tech Specs

      Will It Fit My Mustang

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

          Related Mustang Categories