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Maximum Motorsports Full Length Subframe Connectors; Bare (79-04 All)

Item 47001
AmericanMuscle no longer carries the Maximum Motorsports Full Length Subframe Connectors; Bare (79-04 All). Please check out 2015-2022 Mustang K-Members, Subframe Connectors, & Braces for an updated selection.
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    Video Review & Installation

    Hey guys, Stephanie with, here with the Maximum Motorsports Full-Length Subframe Connectors for all 1979 to 2004 Mustangs. The Maximum Motorsports Full-Length Subframe Connectors are a great option for those owners out there that are looking for a high-quality option to stiffen up the chassis of the unibody Mustang as much as possible.These are full-length subframe connectors and they're designed to be the best on the market. They're longer, thicker and they have more surface area to weld. But, if you're looking to get the most out of a set of subframe connectors then these ones from Maximum Motorsports are going to be your best bet. I'm going to go ahead and say that subframe connectors are an essential modification for unibody Mustangs, no matter which brand you end up choosing. This is because unibody Mustangs don't have a full frame that runs the full length of the car. You basically have two frame sections that are connected by floor pans, so unibody Mustangs rely on subframes and floor pans to provide rigidity and strength. This leaves them very weak and subject to twist, even under the power of a completely stocked motor. A stocked motor can twist and distort the floor pan with ease, and over time this means deformed subframes, which is not a good thing. And, once you start adding power to these cars, which I might as well say is inevitable, then this becomes a bigger issue. This is where the subframe connectors are going to come into play. Subframe connectors, like the Maximum Motorsports one here, link the front subframe with the rear subframe and attach the floor pans. This adds some much needed structural integrity down the length of the car. There are different length subframe connectors and different types as well and the differences are going to come in the amount of support that the connectors can provide you. These subframe connectors are what Maximum Motorsports calls the XL series.So, not only are these full-length connectors that will offer more structural support and rigidity than standard subframe connectors, but these are even stronger with more material. They are both longer and thicker and have more welding surface area than other subframe connectors in the market. These are going to run all the way from the firewall to the rear control arms and their rectangular bare metal tubing. This much length allows for the most welding points down the length of the car, and the more the better in a case like this.So, these are weld-in subframe connectors which can be more difficult or costly to install, but honestly weld-in are the direction that you want to go in if you're serious. Weld-in connectors are stronger and provide more rigidity. Weld-in connectors are thicker and you need that material for the welds, and the performance can't be beat by any bolt-in subframe connector. Subframe connectors should be one of the first suspension mods that are considered when it comes to the '79 to '04 Mustang due to how much it'll help the chassis and performance. Making the chassis more solid and reducing flex will allow the chassis to handle power and torque better, which will only make for a more fun driving experience.I would definitely describe these connectors from Maximum Motorsports as one of the best options that you can go with. The extra length, extra material, thickness and weld-in install allow for a handful of benefits. Benefits like improved handling, launching, ride quality and comfort and floor pan damages prevented since you won't be stressing the floor pan any longer. Chassis flex negatively impacts all of these areas. You can't expect a good handling, launches or ride quality if the chassis is flexing under power. The subframe connectors will keep the frame straight, so the correct components can then function as they should instead of the frame and floor pans doing things like absorbing shock.As far as price, these subframe connectors are one of the better options that you can pick up so they're going to be on the more expensive side when we compare them to the other offerings that are out there. They aren't going to break the bank or anything; they cost $160, which is right in line with Steeda's offering, but there are some less expensive options on the site if these are a little bit more than you like to spend. So, I wouldn't say that the install is difficult, but it does require welding so you're looking at having a shop install these unless you have the equipment and can weld yourself. The install should only take a few hours, and due to the welding, I'm going to call this a '3 out of 3' wrenches on the scale. I would test fit these connectors before you just weld them right in though; and just a heads up for the '96 to '98 Cobras out there, you will need to modify the trans-cross member mounting flanges, but these will work without an issue on all other models. The connectors are side specific so just be sure you've got the correct side before you fully line up and mark where the connector will sit. You're going to want to mark all areas that the subframe touches the connector since this is where you will be welding and you will need to take those areas down to bare metal for the welds. These will be bolted into the floor pan by the two rear seat bolts and these bolts will help you hold the connector up into place for the welding. After the welding is complete, you're going to want to coat the subframe connectors and the frame rails to prevent any rusting.Wrapping things up here, the Maximum Motorsports Full-Length Subframe Connectors are an excellent upgrade for unibody Mustangs that will stiffen up the weak and flexible frame by adding structural integrity. They're a full-length connector with a boxed metal design that gives extra length, thickness and material. These offer numerous benefits for the 1979 to 2004 Mustangs and you can check them out more online right here at

    Product Information

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


    • XL Series Full Length Subframe Connectors
    • Bare Metal
    • 95% Stronger Then the Other Brand
    • 53% Stronger Then MM Previous Connectors
    • Extends from Rear Control Arm to the Firewall for Maximum Results


    Improved Design. The originator of full length subframe connectors has raised the bar for performance again. Maximum Motorsport's newest full-length subframe connectors feature 53% more rigidity then their standard subframe connectors and 95% more then most on the market for mind-blowing performance you'll have to feel to believe. Adding a set of full-length subframe connectors will make sure your car runs straight as an arrow whether it’s off the line or carving back road turns..

    Strength. The XL series subframe connector is longer, thicker, and has more welding surface area than any other subframe connector on the market. Its 1.5” x 2” x .083” thick rectangular tubing extends from the mounting points of the rear control arms all the way to the firewall. With that much coverage you’ll be sure to have a strong bond and plenty of clean metal to weld them onto.

    Application. Maximum Motorsports designed these subframe connectors to fit all 1979 to 2004 V6, GT, Bullitt, Mach 1, and Cobra Mustangs. Even Roush and Saleen Edition Mustangs can benefit from this upgrade as well.

    Technical Note. Please test fit before welding. 1996-98 Cobras will require modifications to the transmission crossmember mounting flanges.

    CA Residents: WARNING: Cancer and Reproductive Harm -

    Installation & What's in the Box

    Installation Info

    What's in the Box

    • (2) subframe connectors
    • Hardware

    Tech Specs


    Customer Reviews (90)

      Questions & Answers

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