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Alloy USA Complete 5-Lug Conversion Kit; 28 Spline (87-93 5.0L)

Item 18959
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$536.29 (kit)

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      Review & Installation Video

      Hey we’re back with stage 2 of AmericanMuscle’s Project Foxbody, as you may remember the idea of this project was to take this GT here and make our very own convertible Cobra Foxbody, something that Ford never offered from the factory. Back in stage 1, this thing was pretty much a total disaster, well as you can see its back from paint, and looks a hell of a lot better, but we still have a hell of a long way to go. Before we get our hands dirty here in stage 2, let’s recap what we knocked out in stage 1. We did a serious overhaul on our drivetrain including a brand new Exedy clutch along with the SR Performance clutch adjuster kit, we then went to work under the hood, giving our 302 a much needed tune up, and replaced our entire cooling system with some help from Mishimoto. Finally we cleaned up our engine bay and added some performance thanks to the SR Performance cold air intake, and the smog pump delete kit. As for the appearance side of things, we addressed some problem areas, like the fender, rear deck lid and headlights, in stage 1 we installed a set of smoked 1 piece headlights, which looked great but with any car build sometimes plans change, so when we got the car back from paint, we decided to swap those 1 piece headlights out in favor of the tried and true 3 piece OE style. Finally and most importantly, we laid out plans to create our very own Foxbody convertible, with the help of our Cobra style body kit and wing, along with that fresh coat of paint. Alright we have a lot to get to in stage 2 so let’s get to it. Alright, so our appearance is certainly on track thanks to our new paint job and Cobra body kit, but we’re still missing a vital part of our cars exterior styling, that would be a new set of wheels and tires, we’re going to go with these black, 17x9 10th anniversary Cobra style wheels, and why not, since they mark the 10th anniversary of the car we’re building. Ok, so obviously these wheels are 5 lug, and they’re not going to fit on our 4 lug Fox, that’s why we’re going to use this 5 lug conversion kit here. This kit is great for a couple of different reasons, the first reason, it’s extremely easy on your wallet, it also includes everything you need to get the job done, including brand new 5 lug 28 spline axle. We’re even going to take this a step further in stage 3, and swap those drums out for disks in the rear, which should not only help the look of those Cobra style wheels but also improve our braking. This third piece Ryan and I are installing should further help achieve the look of our convertible. I’m referring to these 93 Cobra style tail light lenses, granted this is a small part of our Foxbody resto, but they should really flow well with our Cobra style body kit and ultimately help us complete the look. So we just took care of those tail lights and now we’re going to deal with a couple of small eyesores up front here. Ryan’s currently installing some brand new lower windshield molding, since our factory stuff is pretty faded and trashed. We’re also going to install this brand new cowl vent grille, since our GT was missing one when we got it, and it’s really going to tie our GT together. While we’re in this area we’re also going to install brand new wiper arms, and finish it all off with a 14” shorty antenna. So the outside of our Project Foxbody is really starting to come together but we’ve been avoiding the one very big, very ugly elephant in the room, I’m referring to our convertible top or what’s left of it, so we’re going to completely replace this disaster using a brand new OEM quality top, tinted rear glass replacement window, and all the other components necessary to ensure our top on our GT operates just as good, if not better than it did the day our car rolled off the factory floor. Some of those other components I mentioned earlier include a set of brand new top pads, a new boot cover, and all the J-hooks, alignment pins and new cable necessary for install. This is a pretty big job, but when it’s done, all the major exterior parts of our Fox should be looking like new again. The biggest little thing you can do when doing any build such as this is replace all of your moldings and weather stripping. Sure, visually it might not have the same impact as a new set of wheels and tires for instance, but it’s just as important when doing the job correctly. So with that said we’re going to replace all our dried up and cracked factory stuff, with new and fresh rubber and moldings available through the site here. Installing any weather stripping can be a little bit intimidating at first but it’s really not all that bad, in fact most of it either slides or snaps into place, with a few exceptions needing a random rivet or two. In fact I’m working on this belt weather stripping right now, that does need a few rivets, very importantly you want to use a short or stubby rivet, simply because the window operates behind this weather stripping, and you don’t want to interfere with that. Now we’re going to move into the interior which as you can see could definitely use a little bit of love, and we’re going to start with that biggest eyesore, our factory dash, I’m sure a lot of you Fox guys are aware that it’s getting harder and harder to find a factory dash in good condition anymore, so we’re going to do the next best thing and paint ours. We’re going to use SEM’s black interior paint, which should hopefully get our dash looking like new again. A quick little tip here, before you get started painting it would be a great idea to get some fine grit sandpaper, just to scuff the surface up a little bit, and then make sure the area is nice and clean by using alcohol or some other surface cleaner. At that point grab some adhesion promoter or vinyl primer, just to make sure the paint looks its best. On top of our freshly painted dash, which is currently outside drying, we’re also going to replace our carpet. This isn’t the hardest job in the world, but it is a little time consuming, just because you have to remove the seats and some other items. When you do get the old carpet out, don’t throw it away, you’re going to use it as a template to cut the necessary holes in your new carpet, because it doesn’t come pre cut. This carpet, along with that freshly painted dash, should breathe new life into that 20 year old interior. So our freshly painted dash is in, we’ve got our brand new carpet installed, we’ve got our seats bolted back up, things are really starting to come together in here, but we wanted to freshen up a few things, some small areas that have seen a lot of wear over the years, these items include a brand new arm pad for both the doors and the center console, some miscellaneous switches, a new leather shift boot, and knob, and finally this mint condition factory radio that we scored just for our build. Alright, with the exception of our wheels and our top, I know this might not have been the most exciting stage of our build, but the reality is, all the stuff we did here in stage 2, is a necessary step of any proper resto, and our GT is finally looking good again both inside and out. Now we have a solid foundation to work with, I think it’s time to add a little horsepower to the mix, so with that said, we’ll see you in stage 3 of AmericanMuscle’s project Fox body.

      Product Information

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


      • Complete 5-Lug Conversion Kit for Foxbodies
      • Allows Use of 5x4.5" 5-Lug Mustang Wheels
      • Use with Any 94-04 Factory Mustang Wheel
      • 100% New Parts
      • Includes Alloy USA 28-Spline Axles
      • Fits 1987 to 1993 5.0L Mustangs Only


      5-Lug Conversion. This Complete Conversion Kit will allow you to upgrade your 1987 to 1993 5.0L Foxbody Mustang from the standard 4-Lug setup to the more popular 5-Lug setup to allow for a larger selection of aftermarket Mustang wheels. And best of all, this kit reuses your current stock braking system, saving you money.

      100% New Parts. This is not a generic "ebay" kit that reuses old wrecking-yard Ford Ranger axles. This kit features 100% brand new parts, including 28 spline 5 lug axles from Alloy USA. Alloy USA brand Axles are precision machined and finished from premium alloys, with a proprietary dual heat-treatment process for extra strength and a long life.

      Application. This four lug to five lug conversion kit is designed for the 1987 to 1993 5.0L V8 Mustangs including the GT and LX models with a 28 spline 8.8" differential. Does not fit the 4-cylinder or 1993 SVT Cobra models. Kit Includes:
      • (2) 5 Lug Front Rotors
      • (2) 5 Lug Rear Drums
      • (2) 5 Lug 28 Spline Axles
      • (10) Wheel Studs
      • (2) Axle Bearings
      • (2) Axle Seals
      • (2) bottles Royal Purple 75W90 Gear Oil

      Please Note. This 5-Lug Conversion kit requires the use of 5x4.5" (5x114.3mm) five bolt pattern Mustang wheels. We have test fit and found that the follow 5-Lug AmericanMuscle wheels will work with this kit.
      • 16x8 - 1995 Cobra R Wheels in Silver and Chrome with 245/50-16 tires.
      • 17x9 - Bullitt Wheels in Black, Matte Black, Solid Black, Chrome and Anthracite with 245/45-17 tires - May rub rear exhaust pipes, minor modifications or the use of a small 1/4" wheel spacer may be needed.
      • 18x9 - S197 Saleen Wheels in Black, Chrome and Silver with 245/40-18 tires - May rub rear exhaust pipes, minor modifications or the use of a small 1/4" wheel spacer may be needed.
      • 18x9 - 2010 GT Premium Wheels in Black and Chrome with 245/40-18 tires - May rub rear exhaust pipes, minor modifications or the use of a small 1/4" wheel spacer may be needed.
      • 18x9 - 2010 GT4 Wheels in Black and Chrome with 245/40-18 tires - May rub rear exhaust pipes, minor modifications or the use of a small 1/4" wheel spacer may be needed.
      • 18x9 - Motorsport Bullitt Wheels in Black, Chrome and Anthracite with 245/40-18 tires - May rub rear exhaust pipes, minor modifications or the use of a small 1/4" wheel spacer may be needed.

      Fitment: 1987 1988 1989 1990 1991 1992 1993 Details

      Alloy USA 01300








      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (2) 5 Lug Front Rotors
      • (2) 5 Lug Rear Drums
      • (2) 5 Lug 28 Spline Axles
      • (10) Wheel Studs
      • (2) Axle Bearings
      • (2) Axle Seals
      • (2) bottles Royal Purple 75W90 Gear Oil

      Customer Reviews (8)

      Write a Review

      Ratings Summary

      3.5 out of 5 overall rating from 8 customers

      • June 11, 2017

        3 1990 LX - ChrisH

        Good but not good enough,

        I bought here because LMR was out of stock, to do it again I would have went with the LMR kit for no reason other than LMR provides a slightly more complete kit by providing all the front bearings and the friction additive. I would be willing to bet the parts are from the same supplier.

        Helpful (11)
      • May 12, 2017

        1 1989 GT - RubenGarcia

        Trouble Product

        I bought this product for my 5.0 mustang in hopes of being able to buy the rims I wanted. Come to find out, that was not how it worked out at all. After doing research of this lousy product it turns out the hub on the front rotors will not allow you to install newer rims on you car, this mean you're "VERY" limited to the rims you can buy. The problem is the hub is more like a hub that would be used on a truck not a car! But they don't tell you that when you buy it. To make matters worse, I called to return the product and they told me I was unable to do so because I only had 30 days to return the item from the time of purchase “including shipping days”. If you're like me and have to work for a living, it’s very hard to find time to do the job. The least they can do is allow you to return the front rotors for ones that actually work and not limit you to your select of rims. Bottom line is don't buy this product if you want to use newer rims! Please don't waste your money! I'm forced to give one star. Good Luck!

        Helpful (21)
      • January 19, 2017

        5 1990 GT - ballaholic4701

        Dope sauce

        Very good kit quality parts much better axles everything went together with ease left dust caps off front rotors so it wouldn't pop center caps out. One day shipping can't beat that glad I did it

        Helpful (8)
      • October 14, 2016

        1 1992 Other - Chris

        Doesn't fit any wheel like it says

        Rear is great but the front will not fit the 03 cobra wheels I also bought here at AM. The hub won't seat properly. Now I have to spend more money to fix these issues.

        Helpful (9)
      • November 13, 2015

        5 1993 Other - Reefer

        Easy to install

        It great my 15/10 6.5bs weld rts rims fit with this kit great on the rear easy to install rims look good

        Helpful (9)
      • August 16, 2014

        4 1989 GT - 5oSicness

        Overall good

        I received my parts in a short time although UPS did mess up said they couldn't find my address for one of the 6 or 7 packages they dropped off at the same time... Ok? Lol but americanmuscle made it right and got my parts to me. The parts were excellent quality and packaged very well, install was what I expected other then the kit did not include the inner and outter front wheel bearings ( on a 25 year old car, not putting originals back on) ( needs to be part of the kit) but a quick stop to the local parts house and the kit was on in just over a days work... All in all good products and good price 4 out of 5 good job AM

        Helpful (7)
      • July 18, 2014

        5 1989 GT - kennypnx

        5 lug conversion

        it was a great buy. glad I decided to get it, now I can get the rims I really want.

        Helpful (6)
      • July 24, 2013

        4 1993 Other - Stang93

        Easy to install

        Easy to do and very affordable couldn't be happier and now I have so many wheel options

        Helpful (8)

      Questions & Answers (11 answers)

      5 Top Rated Questions

      I have a 1986 mustang gt hatchback.if I buy a 5 lug conversion kit. can I fit 16 inch 5 lug weld prolites of a 51 chevy or will 16 be to big.

      • The Alloy USA Complete 5-Lug Conversion Kit will be incompatible with an 86 Mustang, due to differences in the brake system and spindles. We would be unable to confirm fitment without more info on the wheels, and knowing how the 5 lug conversion would be completed.

      Helpful (0)

      I have a lowered 89 vert. Will any of the 94-98 bullit wheels on this site fit with this conversion? I've heard the center caps will pop off.... I am thinking 18x9 deep dish all around, or 18x9/10 staggered. Let me know thanks

      • The 94-98 Bullitt wheels will fit this conversion and the center caps will not pop off.

      Helpful (0)

      How can you tell if you have a 28 or 31 spline? Also would an Sn95 rear end bolt right up with no modification ? Thank you

      • All 1979-2004 V8 Mustangs came factory with 28 spline axles except for the 2003-2004 Mustang Cobras which came with 31 spline axles. So as long as you don't have a 2003-2004 Mustang Cobra, you would have the 28 spline axles. The SN95 rear ends would bolt right up to a Foxbody, however, they are a little bit longer than the Foxbody rears.

      Helpful (0)

      Why cant these be used to convert an 86 Mustang GT to 5 lug?

      • These cannot be used in an 86 because the 86 and older cars have different front spindles and brake calipers. You will need the spindles and the brakes from an 87-93 to convert you 86 to a 5-lug setup, or find a donor car and take the axles, spindles and brake calipers from a 94-98.

      Helpful (0)

      Is it possible to upgrade the kit to 31 spline axles?

      • We unfortunately do not carry a 31 spline 5-lug conversion kit.

      Helpful (0)
      Post Your Question
      6 More Questions
      I have an 86 Thunderbird Turbo Coupe. Already swapped a Mustang 8.8 rear in. Any issues using this kit with my car? I usually assume yes, but often surprised by how different platform-mates can be. AFAIK, everything the kit would be concerned with is the same. 1 answer
      With this 5 lug conversion, will 15" wheels fit on my 1993 GT convertible? 1 answer
      Are the axles stock fox body length? I ask, because the 17x9 bullets I bought will not clear on my 91 LX with ranger axles. The tire is hitting the inside of the rear fenderwell. I was running a spacer on my Ford bullets, but can't use the spacer without new studs on the American Muscle Bullets. 1 answer
      Brakes Will I be able to use the front/rear disc brakes from a 94-04 with this kit the stock foxbody brakes are pretty limited in choices. I want to get drilled and slotted all the way around without spending 4 grand on a big brake kit 1 answer
      Will this conversion work on 4cyl conversions 1 answer
      Real Cobra R SVT wheels Am I safe to assume the SVT brand Cobra R wheels will work with this set up? Also, will the center caps fit? 1 answer

      Will It Fit My Mustang

      • GT - 87, 88, 89, 90, 91, 92, 93
      • LX - 87, 88, 89, 90, 91, 92, 93

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