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

Market Price $183.97 You Save 13% ($24.00)
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$159.97

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  • Item 47001
  • MPN# MMFL-5B

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    Features, Video & Details

    • 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

    Review & Installation Video

    Review & Install Video

    Hey guys, Stephanie with AmericanMuscle.com, 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 AmericanMuscle.com.

    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.

    Fitment: 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 Details

    CA Residents: Warning: California's Proposition 65

    What's in the Box
    • (2) subframe connectors
    • Hardware
    Installation Info
    Tech Specs
    Will it fit my Mustang?
    • Bullitt - 01
    • Cobra - 93, 94, 95, 96, 97, 98, 99, 00, 01, 03, 04
    • Cobra R - 93, 95, 00
    • GT - 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04
    • LX - 87, 88, 89, 90, 91, 92, 93
    • Mach 1 - 03, 04
    • Other - 79, 80, 81, 82, 83, 84, 85, 86
    • V6 - 94, 95, 96, 97, 98, 99, 00, 01, 02, 03, 04

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    Customer Photos (12) Submit Your Photo

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    Questions & Answers (10)

    5 Top Rated Questions

    Will these work with side exit exhaust? My tail pipe and tip hug close to the frame. I was wondering if these will work with side exit exhausts?

    • Hi, We can not confirm fitment of side exit exhaust with these Maximum Motorsports Full Length Subframe Connectors - Bare because stock mustangs came with rear exit exhaust. A skilled custom exhaust shop might be able to fabricate something for your application.

    Helpful (2)

    Will this fit a 4 door fox body? ie Fairmont, zephyr? can they be custom ordered longer if not?

    • Yes, these will fit on a Foxbody Mustang!

    Helpful (0)

    Say I install these, Could I use a 2 post lift and place the lift points on the ends of these connectors?

    • We do not recommend using the Maximum Motorsports Full Length Subframe Connectors as a lift point.

    Helpful (0)

    Do these come with the seat brace it is not in the picture?

    • Maximum Motorsports Full Length Subframe Connectors only come with the hardware pictured on the site, on top of the subframe connectors of course.

    Helpful (0)

    Buying this comes with both connectors correct?

    • Yes, this will come with 2 Maximum Motorsports Full Length Subframe Connectors.

    Helpful (0)
    Post Your Question
    5 More Questions
    Will these fit a 90 LX notch 4cyl conversion? 1 answer
    Close to purchasing. Just want to make sure they fit on my 1992 GT convertible. Tks B- 1 answer
    Will these fit my 95 GT with a convertible? 1 answer
    Will these work with an 03 Cobra? 1 answer
    Hi There Can we paint the frame connector kit prior to installation and welding ? We will mask area of weld points 1 answer

    People Who Bought This Item Also Bought

    Customer Reviews (70) Write a Review

    Overall Rating 4.9

    out of 5 stars

    Installation Time:Full Day

    Installation Cost:$100-$250

    • Handling Improvement 4.833333 4.8
    • Fit 4.777778 4.8
    • Bang For Your Buck 4.796296 4.8



    • 5/5

      Installation Time: Afternoon

      November 13, 2018

      Highly recommended

      Fitment was excellent. Thick and add exceptional support , went on an 82 notch and it really needed the seat supports that these offer.

      LukeN

      Year: 1982 Submodel: Other

      Helpful (0)

    • 5/5

      Installation Time: Afternoon

      October 03, 2018

      Very well made

      Like I said very well made looks and feels very strong

      Customkenny

      Year: 2001 Submodel: GT

      Helpful (0)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $500-$1000

      September 20, 2018

      worked perfect

      installed these on my 1993 convert. what a difference it makes . Had them all welded in nicely. Had to do some frame work in order for these to work correctly . I had a small spot of rot at the rear plate. had it all fixed up . but after that what a great feel.

      EdC

      Year: 1993 Submodel: GT

      Helpful (1)

    • 5/5

      August 13, 2018

      Stiffed out the fox

      Made the riding experience a heck of a lot more manageable! I dont feel like every semi truck is going to suck me into inevitable doom each time I pass them by. For new fox owners, this should be your very first upgrade!!

      GraceG

      Year: 1988 Submodel: LX

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      July 10, 2018

      All good

      Did exactly what expected. A must have if ya want to grab a gear and go!

      GregL

      Year: 1992 Submodel: LX

      Helpful (1)

    • 4/5

      May 01, 2018

      Subframe

      My subframe connectors showed up very fast the box they came in wasn’t banged up and for the subframe connectors the Welds Weltz are very clean looking . I haven’t had a chance too have them installed yet . But it’s coming close too that time

      ErikS

      Year: 1989 Submodel: LX

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      April 24, 2018

      Purchase worth the time and money

      Once I got all the parts in place and set up, installation was not bad at all. Had to rework portions of the frame where improper jacks was used before. Noticed an instant difference when I go over bumps, the whole car sounded like it was going to fall apart.

      ArthurA

      Year: 1987 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Full Day

      April 11, 2018

      Nice Fit and Finish

      Fit well. Installation instructions were straight forward. Took a little longer than expected due to damage to stock subframe.

      TimothyB

      Year: 2001 Submodel: Cobra

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      April 04, 2018

      Wow. Just Wow.

      I am absolutely blown away by this product. I see now why everyone says that Maximum Motorsports has the best products out there for Mustangs. My Mustang is a convertible GT, and after 15 years of being on the road, the chassis was quite flexible. So, I ordered these in November and I just got them put on today, since the weather is only now passable here in the Midwest. The installer was very impressed with the fitment, and he even went as far as saying that it almost looked like the subframe connectors were custom-made for my car. It took him about 2 hours to weld up and paint, but he is a racecar fabricator so other less experienced welders may not have the same quick results. The car feels so much more solid. I could tell this as soon as I sat in the car--I don't think there are many other mods for which you can tell as big of a difference in as short of a time. Cabin squeaks and rattles are all but nonexistent now (even the door rattle!). Nose diving while braking has been greatly reduced and the car rides much better now that the flex is eliminated. Needless to say, I am a very happy camper.

      Andrew

      Year: 2002 Submodel: GT

      Helpful (6)

    • 5/5

      Installation Time: Weekend

      April 03, 2018

      MM Subframe connectors

      They seem to fit the car well but my subframes were abused by the previous owner. I should have welded some flat to the bottoms to level the front subframes. Thought of it too late but maybe it will help the next person or even better some angle iron to stiffen the whole subframe.

      Cmlindauer

      Year: 1998 Submodel: Cobra

      Helpful (4)

    • 5/5

      Installation Time: Less than 1 Hour

      April 01, 2018

      Excellent product at a great price!!!

      My Launch and handling improved greatly after I welded the sub frame connectors on. I launch straighter and both tires stay planted to the ground. Thanks AM.

      labbett03

      Year: 2003 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Weekend

      March 22, 2018

      Subframe Connectors

      Solid product. Good fit. A little more prep work with the Convertible bracing. I’m in the middle of a big project from front to back. Thought I’d start with the Frame Connectors. Can’t wait to try it on the road this Summer.

      ChuckD

      Year: 1990 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Less than 1 Hour

      March 20, 2018

      Huge handling difference

      I welded these on with a good MIG machine and oh buy was there an immediate difference. Felt a ton more confident on road coarses. There is honestly no downside to having these other than the weight but I highly recommend these to any mustang owner regardless if it's a daily driver or track ca, you NEED this. P.S. this also helps with overall chassis flex, I noticed that while I was installing these my chassis was slightly bent as the ends didn't align with the frame meaning I already had started to see some deformation. Hopefully these will prevent any future deformation.

      Fernster

      Year: 2004 Submodel: GT

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      February 16, 2018

      Great Product

      Great product easily worth the money. Feel the difference immediately. Installed these on my 04 cobra.

      HXCLAMBFAN

      Year: 2004 Submodel: Cobra

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      December 10, 2017

      wally gator

      Best subframe connectors out there. No problem if you have a welder and know how to use it,

      WalterC

      Year: 1998 Submodel: Cobra

      Helpful (4)

    • 5/5

      Installation Time: Afternoon

      September 23, 2017

      Perfect fit

      These subframe connectors from MM fit superbly and have the quality I've come to expect from MM. Two thumbs up!

      MichaelM

      Year: 2004 Submodel: GT

      Helpful (2)

    • 5/5

      Installation Time: Afternoon

      September 11, 2017

      Great performance difference

      Product is well made and fit with no issues. This is something that I should have installed a long time ago.

      Trmn8tr

      Year: 2003 Submodel: Cobra

      Helpful (4)

    • 4/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      September 07, 2017

      Sub frame connectors

      Work great really firmed up the way the car rides. Also handles better. Would have give a 5 if they were painted.

      Tom

      Year: 1989 Submodel: GT

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      August 21, 2017

      Subframe Connectors

      I think these are well built subframe connectors. Had them installed at a shop. Look great. Very pleased with them.

      JasonB

      Year: 1997 Submodel: Cobra

      Helpful (3)

    • 5/5

      Installation Time: Shop Install

      Installation Cost: $100-$250

      July 26, 2017

      Should be your first buy

      Stuff cost but hey. For a better ride. AM has it all. Highly recommended these for durability over the lower costing parts

      02Stangbud

      Year: 2002 Submodel: GT

      Helpful (1)

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