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NGK Iridium IX Spark Plugs (93-01 Cobra; 96-04 GT, Mach 1; 98-04 V6)

Item 64007
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Market Price $79.99 You Save 13% ($10.00)
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$69.99 (set of 8)

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      Review & Installation Video

      Well, here it is, our new project car, and as you can see I use the term new very loosely, you Fox body folks have been asking for it, so we’re going to give you a build unlike anything we’ve ever done before, we’re going to do a complete restoration on our 93 GT convertible, and you guys are going to be with us every step of the way. So what are our plans? Well, to say this thing is a little rough, would be the understatement of the century, we need to tackle just about everything there is on this car, I’m talking bodywork, paint, interior, headlights, and what’s left of our top just to name a few. Obviously we’re fans of just about every Mustang under the sun however there are a few that really get us going. One of these is the 93 Mustang Cobra, this was one of the first cars offered by Ford’s SVT division, and really set the tone as far as factory performance tuning is concerned however there was one problem, it was never offered in a convertible so we’re going to actually have a little fun with this build and make something we wish Ford had offered from the factory, we’re going to make our very own Mustang 93 Cobra convertible, which should really turn our tired old Fox into one bad little street machine. Before we get into the fun stuff, we need to take care of some much needed maintenance here on our 93, mainly the worn out and the 100000 plus drive train and body. So that’s the goal with this first step, we’re going to get our GT running like new again, and get the car ready for paint, because…yeah, we got a lot of work to do, so let’s get to it. Alright, 100000 miles of burnouts and hard launces has not been nice to our factory clutch, because it’s absolutely shot, so this is one of those areas where we’re not only going to freshen up, but we’re also going to upgrade, now our upgrade comes in the form of this Exedy Mach 350 stage 1 clutch, and the SR Performance clutch adjuster kit. This kit will replace our old, worn out, gummed up factory cable with this brand new adjustable cable as well as strengthen the weak plastic factory clutch quadrant with this brand new Billet piece. Basically we’re strengthening our overall shifting experience. Besides our beat clutch, our 302 motor is running extremely rough, we’re misfiring all over the place, and the power just isn’t there like it should be, so we’re going to give our motor a serious tuneup. Ryan and I are in the process of installing these iridium plugs as well as a new set of wires as well, on top of that we’re also doing a brand new distributor cap and rotor, and finally a brand new serpentine belt. All these parts should really get our 5.0 firing on all 8 cylinders again. As a little pointer for you whenever you’re doing a tuneup, we recommend using a little anti-seize on all your threads, just because you don’t want a stuck spark plug in your block. In addition, go ahead and throw a little dielectric grease on all your contacts, it’ll just help keep any excess moisture out. Unfortunately our slipping clutch and misfires are only part of the problem, when we were on the way back to the shop we noticed are car was running a little hot so we decided to overhaul our entire cooling system just to be safe. We’re ditching our factory radiator and mechanical fan in favor of this aluminum performance unit from Mishimoto, along with one of their electrical fans. This electrical fan will not only keep things cool, but by ditching that mechanical fan, we’re also going to free up some drag on our accessory belt, which in turn should free up some extra horsepower. To wrap up our entire cooling package we’re going with a brand new thermostat from Mishimoto, along with a new set of hoses from Ford Racing. Of course we have some performance stuff lined up after we get the car back from paint, but in the meantime we have to address this Frankenstein intake we found on the car, we’re going to replace it with this brand new SR Performance cold air intake which, besides giving us a nice little bump in power and sound, will more importantly get rid of this eyesore underneath the hood. Before we get out of the hood completely, we wanted to further reduce the parasitic drag on our accessory belt, so we decided to install this SR Performance smog pump delete kit. Could we run a smaller belt and eliminate the pump completely? Probably, but we wanted to do it right the first time, and clean up the engine bay in the process. Now that we’ve taken care of some necessary maintenance, let’s get to the next big part of the first stage of our resto. The only thing worse than the actual running condition of our GT is the physical condition, I’m not going to lie, this thing is pretty rough in just about every way, but that’s about to change, we’re going to send our GT off for some serious bodywork that includes a brand new paint job, but first, we need to take care of some problem areas. Some of these problem areas include a brand new set of smoked, one piece headlights, a new fender and a rear deck lid panel just to name a few but that’s not all that exciting, this is what’s going to turn our dream build into a reality, we’re going to outfit our 93 GT with a complete Cobra style body kit, along with this Cobra style wing, which when we’re done with our build, should turn our stock 93 vert, into one of the baddest, and possible one of the only, Foxbody convertible Cobras around. Well, that wraps up the first stage of the restoration here on our 93 GT, we took care of some much needed maintenance and got the car ready for the body shop, when we get the car back from paint, we’re really going to start having some fun with the interior and exterior styling, and of course give the car some much needed performance to back up that Cobra appearance, but in the meantime, I’m on my way to paint.

      Product Information

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


      • Iridium Tip for a Constant Stable Spark
      • Improves Fuel Economy and Lower Emissions
      • Heat Range: 5
      • NGK Part# 7164
      • Sold as a Set of 8
      • Fits 1993-2001 Cobra; 1996-2004 GT, Mach1; 1998-2004 V6 Mustangs


      High Performance. Keeping your Mustangs high performance engine running smoothly and efficiently is important, so routinely replace your old weak plugs with a new set of NGK Iridium IX Performance Spark Plugs for constant reliable spark power. The Iridium IX plugs from NGK will provide improved throttle response, fuel efficiency, lower emissions, and will reduce fouling.

      Superior Materials. NGK Iridium IX Performance Spark Plugs feature a copper core electrode for its superior conductivity and an iridium tip (which is 6X harder than platinum) for it's extremely high melting point, perfect for keeping your Mustangs high-performance engine running at it's peak. And as an added bonus the Iridium IX plug features Trivalent Metal Plating for it's superior anti-corrosion and anti-seizing properties.

      Application. This set of eight (8) NGK Iridium IX Performance Spark Plugs are specifically designed as a direct fit replacement for the 1993-2001 SVT Cobra, 2003-2004 Mach 1, 1996-2004 GT/Bullitt and the 1998-2004 V6 Mustangs.

      Fitment: 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

      MPN# 7164

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (96)

      Write a Review

      Ratings Summary

      4.7 out of 5 overall rating from 96 customers

      Installation Time: Less than 1 Hour

      Installation Cost: $100-$250

      • July 06, 2019

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

        Love them

        Regained a little lost get up. Super easy with 4.6 and well worth the money. I definitely recommend.

        Helpful (1)
      • May 05, 2019

        5 2004 GT - Lansky Installation Time: Afternoon

        Great Plugs

        Bought NGK plugs took less than 2 hours to install with New MSD Coils. Make sure you check gap on plugs because they are not pregapped. Car definitely feels smoother with a little more response. Not sure if gas mileage is any better but car feel like it's running and idling great. I would definitely recommend if your doing a tune up.

        Helpful (2)
      • April 08, 2019

        5 2002 GT - SaleenGT Installation Time: Less than 1 Hour

        Love it

        Great product. Already calibrated and ready to slap on!

        Helpful (1)
      • March 04, 2019

        5 2000 GT - Brian Installation Time: Less than 1 Hour


        Made my misfire disappear and my stang feels new !

        Helpful (2)
      • February 25, 2019

        4 2000 GT - MatthewT Installation Time: Less than 1 Hour

        Great product

        Terrific quality! Like the old saying goes, “you get what you pay for”! These were long overdue and work terrific with my MSD ignition coils! Would highly recommend this product!

        Helpful (2)
      • January 23, 2019

        5 2001 GT - Michael Installation Time: Less than 1 Hour

        Great product!

        Very super easy install, and helped my car feel alive again! Recommend the product great quality, great price !

        Helpful (2)
      • January 16, 2019

        5 2000 GT - Cplogic Installation Time: Shop Install Installation Cost: $100-$250

        First set since 96k

        These plus new coils made my 2k Mustang GT with 90,000 miles act new again. Did not really expect such a significant change.

        Helpful (2)
      • January 12, 2019

        5 2003 GT - DonaldL Installation Time: Shop Install Installation Cost: 0-$100

        Good Plugs

        Seam to work good! Had a miss prior to install, fixed it .

        Helpful (1)
      • November 08, 2018

        1 2009 GT - TonyC


        I ordered these for my 2002 gt and they did not even come close to fitting. They almost fell into the cylinder they were that small.

        Helpful (7)
      • September 16, 2018

        4 2002 GT - 02Stangbud Installation Time: Less than 1 Hour

        Spark Plugs

        Honestly I expected a little more out of these, but it did wake up my car some what. Bought these to clear up some misfires and it did just that. Also paired these with the Accel Coils, and it becomes a worthy combo

        Helpful (3)

      Questions & Answers (20 answers)

      5 Top Rated Questions

      Will this Spark plugs direct fit my 98 ford mustang 3.8 V6 base model engine?

      • The NGK Iridium IX Performance Spark Plugs is made to fit in any V6 Mustang from 1998-2004.

      Helpful (2)

      In the listing it claims to fit an ‘03/‘04 mach 1 but then the fitment guide says it is not compatible, do these work for a mach 1?

      • Yes, this is compatible with 03-04 Mach 1 models.

      Helpful (1)

      do i have to gap these spark plugs?

      • Yes, it would be recommended to gap these spark plugs to the proper gap for your Mustang before installing them.

      Helpful (1)

      i need spark plugs for mustang 2002 v6 3.8 this spark plug is good idea

      • These NGK Iridium IX Performance Spark Plugs will absolutely work on your 2002 V6!

      Helpful (1)

      will this fit on a v8 engine

      • Yes, This set of eight (8) NGK Iridium IX Performance Spark Plugs are specifically designed as a direct fit replacement for the 1993-2001 SVT Cobra, 2003-2004 Mach 1, 1996-2004 GT/Bullitt and the 1998-2004 V6 Mustangs.

      Helpful (0)
      10 More Questions
      will these fit a v8 engine 1 answer
      Which spark plugs are better the NGK, MSD OR EG? 1 answer
      Would these work well in a 04 mustang Gt with a kenne bell supercharger ? 1 answer
      Are these plugs pre set or do they have to be adjusted for a 2001 cobra ? Thanks 1 answer
      Can these be used as a replacement to a stock engine? 1 answer
      What are the torque specs? I googled it and see many answers. 1 answer
      Can these be used with a Procharger? 1 answer
      Can this work with SR Performance Shock Coil On Plug Kit (99-04 GT)? 1 answer
      Are these good to use for supercharged applications? 1 answer
      Gt40x Can these be used with gt40x aluminum heads? 1 answer

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (8) Spark Plugs

      Tech Specs

      Will It Fit My Mustang

      • Bullitt - 01
      • Cobra - 93, 94, 95, 96, 97, 98, 99, 01
      • Cobra R - 93, 95
      • GT - 96, 97, 98, 99, 00, 01, 02, 03, 04
      • V6 - 98, 99, 00, 01, 02, 03, 04

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