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Ford Performance 0-Degree Spark Plugs (08-10 GT)

Item 50373
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$95.99 (set of 8)

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      Product Information

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


      • Perfect for Nitrous and Force Inducted Engines
      • Colder Heat Range
      • 12mm Thread Pattern
      • Sold as a Set of 8
      • Fits 2008-2010 GT and Bullitt Mustangs w/ Brown Coil Boots


      More Power. When adding power adders like nitrous, superchargers, or turbos to your Pony you need the correct spark plug to maximize horsepower. That is where Ford Racing "0-Degree" Spark Plugs come into play, these plugs are specifically designed for applications that require a one step colder heat range.

      Legendary Ford Racing Performance. Add performance parts to your Pony made by the people who know it best. Ford Racing's legendary quality and performance ensure these 0-Degree Spark Plugs will deliver the consistent results you need to tune for maximum power.

      Application. This set of eight (8) Ford Racing 0-Degree 12mm Spark Plugs are specifically designed as an upgrade for nitrous or force inducted 2008 to 2010 GT and Bullitt Mustangs equipped with Brown coil boots only.

      Identifing Your Coils. Engines with late style 12MM spark plugs can be identified by coil engineering number 8L3E printed on the coils. Engines with early style 16mm "High Thread" design spark plugs can be identified by coil engineering number 3L3E.

      Fitment: 2008 2009 2010 Details

      Ford Performance M-12405-3V12mm

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (24)

      Write a Review

      Ratings Summary

      4.6 out of 5 overall rating from 24 customers

      Installation Time: Afternoon

      Installation Cost: 0-$100

      • July 14, 2019

        5 2010 GT - Kollino Installation Time: Less than 1 Hour

        2010 Mustang gt

        Fixed my idle problems right up and easy to install like all spark plugs.

        Helpful (0)
      • June 15, 2019

        5 2010 GT - Memo Installation Time: Less than 1 Hour

        Great spark plugs

        These spark plugs are a must for any force inducted mustangs. I felt a big difference on my 427R, it responds a lot faster. I would highly recommend these plugs!

        Helpful (0)
      • May 10, 2019

        5 2009 GT - SonnyZ

        Tune Up

        Mustang ran "great" but it was "tune up time" (miles). I was really surprised at the performance gain these spark plugs made. I also put on 4 new tires, four wheel alignment/balance/new KandN filter so I think "the combination" probably made a "New Car Go Fast Feel"....

        Helpful (0)
      • March 18, 2019

        5 2008 GT - Tswag Installation Time: Afternoon

        Zero degree plugs

        Put a set zero degree plugs with msd coil packs in my 08 gt Roush supercharged 4.6 . Worth every penny car came alive !!!! Throttle response is amazing and perfect smooth idle .

        Helpful (2)
      • May 14, 2018

        1 2010 GT - ChaseA


        Garbage. Misfire a lot under boost. The brisk spark plugs are the far better choice

        Helpful (7)
      • June 07, 2017

        4 2010 GT500 - Jay

        Perfect for nitrous

        Needed colder plugs for my car since I'm running nitrous and these were perfect

        Helpful (8)
      • June 06, 2017

        2 2010 GT - BradH Installation Time: Afternoon

        Not realy Ford plugs

        I'm not sure why these are advertised as Ford Performance plugs when they are not Ford branded. The plugs fit fine and the car runs fine but I was expecting a Ford product based off the description. What arrived was a standard set of NGK Iridium plugs that I had to re-gap. No big deal but just not what I thought I was buying or worth returning since I needed new plugs. You can however buy these plugs cheaper as they arrived thus the low rating. I installed these as a maintenance item to my car so I wasn't expecting a performance gain. Since it's requested for the review I put that at 2 stars as you're not really gaining much, if any, HP from plugs unless your old plugs were toast already. Although I'm rating them low, they fit fine and perform as expected in my M-90 SC car.

        Helpful (8)
      • March 31, 2017

        5 2008 Bullitt - PatrickW Installation Time: Less than 1 Hour

        Ford performance 0 degree spark plugs,

        Great quality spark plug, good for nitrous and any other forced induction set ups, I'm very pleased with the quality and price of this product, I'd highly recommend these plugs

        Helpful (8)
      • March 13, 2017

        5 2010 GT - Gt Installation Time: Less than 1 Hour

        Great response time

        Best sparkplugs out there for you gt would seriously recommend to all looking for that new replacement great response time and best idle jet so far strongly recommend

        Helpful (9)
      • November 06, 2016

        5 2008 GT - Shelbystangkb Installation Time: Less than 1 Hour

        Late 08'-10' 4.6 boosted spark plugs

        My car has been running brisk racing plugs and has had a weird misfire with only 5k miles on the brisk plugs.I recently installed the ford racing(which is an Ngk plug once u open the box)the car literally runs like stock and perfect then when the kennel bell kicks in it's like the smoothest rocket you've ever felt I say these plugs are 10/10 and p.s. there perfectly pre gapped also.

        Helpful (9)

      Questions & Answers (5 answers)

      5 Top Rated Questions

      What heat range are these? I understand they're 1 colder than stock, but what is that? I already have NGK plugs in a heat range of 7 and i'm trying to figure out if it's the same or not.

      • The stock heat range will be a heat range of 5. The Ford Performance 0-Degree Spark Plugs (08-10 GT) are one step colder then stock putting these spark plugs at a heat range of 6.

      Helpful (3)

      How would these work on my GT? I have an 08 GT with no nitrous or force induction...will there be any difference if i put these on my GT?

      • yes, I installed in my 09' , What a difference, More power, starts first try. Excellent Plug for the $$$$

      Helpful (1)

      I have an early 2008 Mustang GT (Oct/07). will these fit my mustang if it isn't a mid2008? and are they compatible with OEM coils?

      Will they work in 07 gt with Accel yellow coils

      • Hey JustinJT5U3148420, The plugs you have listed will not as they're listed for 08-10. However check out the link below I have posted some plugs that will work for your particular application.

      Helpful (0)

      I ordered the 50373 plugs for my 07 GT can I use them? 07 GT 4.6

      • The Ford Performance 0-Degree Spark Plugs (08-10 GT) will not work on your 2007 mustang. This will only work for 08-10 GT mustangs.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (8) Spark Plugs

      Tech Specs

      Will It Fit My Mustang

      • Bullitt - 08, 09
      • GT - 08, 09, 10

      Intended for use with nitrous, turbo, or supercharged applications

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