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Steeda Weight Jacker Adjustable Mustang Billet Lower Control Arms - Spherical/Poly (1979-1998)

$50.00 (8%)
Think all control arms are the same? Think again, Steeda has raised the standard for others to follow. This revolutionary new arm features a one-piece billet design that is far superior to the twisted and welded steel arms available today.

Part Number: 555 4412
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Think all control arms are the same? Think again, Steeda has raised the standard for others to follow. This revolutionary new arm features a one-piece billet design that is far superior to the twisted and welded steel arms available today. The solid billet construction virtually eliminates deflection without sacrificing weight. Each arm weighs under 7 lbs. (Competitors arms weigh 30% more.)

The adjustable spring seat allows you to raise or lower the rear of your Mustang up to 1" with just the turn of a standard 1/2" ratchet. Plus, Steeda went the extra mile by using a roller bearing assembly on the spring seat to make adjustment even easier. Steeda's 3-pc. bushing design positively locates the axle for maximum traction and control without torque-box damaging suspension bind. Patent pending.

U.S. Design Patent 494,887 - U.S. Utility Patent Pending

Learn the differences in Steeda brand control arms, read our blog post for more info:

Product Benefits
  • More Traction
  • Better Handling
  • Adjust Ride Height

CA Residents: Cancer and Reproductive Harm WARNING

Scott Boda, here with Steeda Autosports, to talk about our Billet Weight Jacker Lower Control Arms for all your 79-04 Mustangs. Okay, so we're here with our Billet Weight Jacker Lower Control Arm. I absolutely love this control arm. Why? Because it can do a little bit of everything, right? So we have bushing options: front and rear for your street cars. We've got bearings at one end, bushings at the other. You could do Delrin and bearings - basically, it's adjustable from the street to the hardcore enthusiast at the strip. And you can constantly modify it, so you don't have to buy another control arm. You can literally pop these things out, put the bearings in. The other thing is - it's a weight jacket control arm. Use a half-inch socket drive, and you can raise and lower the rear of your car. So, it kind of acts like a Coilover setup without having to relocate the spring perch, go with a custom set of shocks and struts. So, it is fantastic! A little bit behind the manufacturing process of this, which is my favorite part. With the weight jacker control arm body, we start with over 15.4 pounds of Billet T-6061 aluminum. When we're done machining it, we only got four-and-a-half pounds. So, what you see here is an I-Beam construction. That is a super-strong construction. These things are guaranteed for life. They work on 14, 12, 13-second cars, all the way to 8-second, you know, all-out drag cars. I've ran these on my fox for many, many years because, like I said, hands down - I think they're the best lower control arm out there for your 79-04 Mustang. So what we got here is - you put in your half-inch ratchet, and you can actually raise your car and lock it in with this jam nut. We have roller bearings underneath the spring perch, so it turns. So, you're not grinding away at your spring as you try and lower up and down the control arm. We have removable rear swaybar tabs. Therefore, if you're running an anti-roll bar, maybe a different rear swaybar setup, those can be removed for additional weight savings. And like I said, the beauty of this arm is it's one-stop-shopping. You can get it with bushings on both ends - offers extremely really good ride quality. It's not going to be noisy. We use our Steeda exclusive three-piece bushing in it. You'll see that it does come with zerk fittings, so you can grease and maintain these arms for the life of your Mustang. Then, let's say you get in a little bit more serious, hardcore racing, and you want to go to the autocross or the drag strip. You can then switch from a bearing mount to Delrin in the front. Like I said, these control arms can do absolutely everything. But the best part to me is - you get to get your Mustang looking absolutely perfect. Get underneath there with a half-inch socket drive, and you just crank away. And you just raise and lower the rear of the car. That's great for many reasons. Not only aesthetics, but you can set your corner weight. If you have a battery relocation kit in the back-right side of your trunk, you can always dial it up - get a little less weight back there. Try and dial it in, so when you pull those front wheels, you hit those tires, you're hitting them evenly. One of the beauties of this arm is it doesn't have to come later on down the line after you've already added a bunch of parts to your car. Most people start off with what? Exhaust, Aesthetics - So get yourself a set of lowering springs, and then you might notice some wheel hop. These are the ticket. Get a set of the weight jacker lower control arms, maybe a set of our double adjustable uppers, and install them. And like I said - get your ride height exactly where you want it. There's no sense to go in with a full Coilover setup when you can add something like this. Save weight, save time, and look damn good in the process. Now, these items are manufactured right here in our Valdosta facility, They're made in the USA. They have a lifetime warranty, and like I said - From the street enthusiast to the hardcore racer, I don't think there's anything better than the Steeda Weight Jacker Lower Control Arm. If you like the video, you like our content, click subscribe! Follow us on our social media pages, and remember, Steeda's where Speed Matters!
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Fitment & Features


Manufacturer: Steeda Autosports
Made in USA: Yes

Installation Information:

Level of Difficulty: Tech Recommended
Install Time: About 2 Hours
Tools Required: Basic Shop Tools
Print Instructions: Installation Instructions

Vehicle Fitment:

Fits Model Year: 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998
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