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

42 Reviews
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  • Item #47001
  • MPN# MMFL-5B

  • Market Price $183.97
  • You Save 13% ($24.00)
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  • 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.

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

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

Most Helpful Reviews

Night and day difference

I never really realized how flexible the chassis was for my 04 gt until I had a shop install these subframe connectors. When I opened up my door and sat in my car after picking it up, I could immediately ...

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Helpful (1)

Nice and stiff.

My older brother welded, with my dad and I helping throughout install. Installation not including trips to the store took about 7 to 8 hours. After welding, I sprayed the subframes with 3M rubberized ...

Read More
Helpful (2)

Overall Rating 4.9 out of 5 stars
Read All 42 Reviews

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1 Questions / 1 Answers

Ask a Question

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.

    Chris J

    Good Answer (0) (0)

Question Resolved

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Customer Reviews (42) Write a Review

Overall Rating 4.9

out of 5 stars

Installation Time:Weekend

Installation Cost:$100-$250

  • Handling Improvement 4.769231 4.8
  • Fit 4.653846 4.7
  • Bang For Your Buck 4.807693 4.8

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    July 04, 2016

    Night and day difference

    I never really realized how flexible the chassis was for my 04 gt until I had a shop install these subframe connectors. When I opened up my door and sat in my car after picking it up, I could immediately tell that these subframe were going to live up to their hype and make a huge difference in handling. While I was driving the car home it just felt solid. Before the subframe connectors, if I hit a bump in the road the chassis would flex and soak up the bump, but with the subframe connectors the chassis remains solid and doesn't allow for any flex, rather it forces the suspension (Shocks, Struts) to do its job. Not only do they make the car feel more solid, they also help with launching. The V-8 engines they put in the new edge mustangs are torquey, as a result when you launch the car or accelerate hard the weak chassis flexes and absorbs some of that torque, meaning less power to the rear wheels and a higher possibility of losing control (fishtailing). However, with the MM subframe connectors my car launches straight as an arrow (as long as its dry) and you can feel that all that power is being sent to the rear wheels and none of it is lost due to chassis flex. This is the only suspension mod I've done for my car, but I'm extremely glad I caved in. If you want your new edge mustang to feel and act like it's structurally sound, and launch harder then look no further, this is the mod for you.


    Year: 2004 Submodel: GT

    Helpful (1) (0)

  • 5/5

    Installation Time: Full Day

    August 06, 2012

    Nice and stiff.

    My older brother welded, with my dad and I helping throughout install. Installation not including trips to the store took about 7 to 8 hours. After welding, I sprayed the subframes with 3M rubberized undercoating. I have only driven the car with 15x3.5 front rims since install, so I can't comment on much of a handling improvement. But I have noticed it feels much stiffer during day to day driving. I'm looking forward to checking out the handling once the 17x9s are back on the front.


    Year: 2001 Submodel: GT SC

    Helpful (2) (0)

  • 5/5

    June 08, 2011

    Best you can buy

    These are buy a long shot the best subframe connectors you can buy. By far the stiffest, you will notice them as soon as you open/close your doors, take a driveway, let alone get on the exit ramps and thrash the car around. They work excellent, anywhere these touch the metal on the car you should weld for ultimate stiffness. Powdercoat is pointless as you need to strip them wherever welded, so do yourself a favor like I did get the bare ones and then spray them with a rubber undercoating afterwards and they'll stay like new for years and years. A highly recommended buy and absolutely critical on the 79-04 fox chassis.


    Year: 2000 Submodel: Other

    Helpful (7) (0)

  • 5/5

    February 16, 2010

    Max Motorsports subframe connectors

    Really made a difference in my 96 Gt convertible. Drives like a different car. A great mod for the money especially to a convertible. This should be a first mod for any Mustang.


    Year: 1996 Submodel: GT

    Helpful (6) (0)

  • 5/5

    Installation Time: Afternoon

    August 15, 2012

    love mm

    Got them pretty fast, used a15% off promo. Feels wayyyyyy stiffer then stock. Welded them myself. Thanks am


    Year: 1998 Submodel: Cobra socal

    Helpful (3) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: 0-$100

    July 21, 2012

    Best "First Mod" Ever

    What can I say, they made a huge improvement! Not only did they take the harshness out of the ride, but they made my car track straighter off the line as well. I had a shop install them locally, labor on the install was $75. And it was well worth it. And AM was awesome to order from. Free, fast shipping....what more could you ask for. Thanks American Muscle!


    Year: 2003 Submodel: GT Bowling Geen, KY

    Helpful (3) (0)

  • 5/5

    March 08, 2011

    Good bang for buck

    Fairly easy installation, Make sure you clean them off (brake parts cleaner) and prime the undersides at least before you mount them up and weld them. These made my car much stiffer, better weight transfer, better braking and much better handling. I would highly recommend these subframe connectors. 2 day free shipping? Can't beat it!


    Year: 2004 Submodel: GT

    Helpful (7) (4)

  • 5/5

    August 18, 2010

    Excellent suspension mod!

    Lets you feel the road better and eliminates chassis flex which means more power to the wheels. Im very happy with this modification. Thanks AM!

    David 2001 GT

    Helpful (2) (0)

  • 5/5

    March 10, 2010


    I have MM LCAs and now the SFCs. Both products are great. The SFCs really stiffened the chassis up. This should be one of your first suspension mods hands down. Also the product got here in 1 day! Cant beat that!


    Helpful (2) (0)

  • 5/5

    October 04, 2009


    Installed them at my friends house with a 220 amp welder look great really stiffened the chassis up definetly a good first mod!!!


    Helpful (2) (0)

  • 5/5

    July 17, 2010

    perfec fit

    They just came in a Wednesday, Friday I went to the mufler shop and in less than 45min they were in place in my 2002 GT. There were no other customer waiting so I went ahead and clean soldered areas and all the frame, primer and paint. Feel the difference on the street.


    Year: 2002 Submodel: GT

    Helpful (3) (1)

  • 3/5

    May 10, 2010

    MM Full length subframe connectors

    Good product made of quality material but the troubleshooting in the instructions for proper fitment is poor. Needed to make alterations. After install i was impressed with the products quality and noticed a significant reduction in chassis twist and flex. Would recommend but experience with metal is a must.


    Helpful (4) (2)

  • 5/5

    Installation Time: Afternoon

    April 10, 2014

    Must Have!!!!!

    I really can't speak on the other subframe connectors, but these connectors saved my legs and possibly my life. I had a front end collision at or over 60 mph. I T-Boned a car that pulled out in the on the highway to go in the opposite direction and never looked my way. I hit him so hard that the front driver side Was smashed in that everything in the front of the car on that side was unrecoverable. The damage stopped right there were the front part of the connector was welded in. I will recommend these connectors to everyone I know and will put them on every Mustang or Capri I own.


    Year: 1985 Submodel: Other Fort Washington, MD, USA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    February 07, 2014

    Maximum Motorsports or bust!

    I got these for myself as a Christmas gift and I wish I had bought these a looooong time ago. I have had my 2003 for about 5 years and it has 120k on it now. Due to the mileage and age I wanted to help my car out. These definitely make the car feel tighter and overall more fun to drive. These helped me feel more confident while taking corners and it feels like the car is planted to the ground better. There is hardly any flex and when I am at WOT, the car feels solid and not bouncy like it used to at higher speeds. Also these helped me plant the power to my rear tires a little better than it used to, I know my car needs the rear suspension components refreshed to really help it launch but these helped me out for now. Overall I highly recommend you get these if you want to do something to your car and its completely stock or mildly modded. Buy these instead of a cold air intake cause you will enjoy this mod much more and you will fall in love again with you Mustang, cause I know I have. For the install I paid $250 to have them welded in, the hard part was finding a shop that would do a good job and know what they were doing.


    Year: 2003 Submodel: GT Texas

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    Installation Cost: $100-$250

    August 12, 2013

    makes your springs work intead of your chassis

    Since i had these installed, i can actually tell that the springs are working when going over bumps. The car feels like it moves more as a single unit.


    Year: 2004 Submodel: GT middle Tennessee

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    June 25, 2013

    Great improvement

    It is hard to describe the difference in the ride, but there is one. I would describe it as an increase in quality almost. The car just feels like it should have from the factory. It moves as one and no longer has that floating detached feeling. If you get ANY suspension mod, get this one.


    Year: 2004 Submodel: Mach 1 Hampton, VA

    Helpful (1) (0)

  • 5/5

    Installation Time: Afternoon

    March 08, 2013

    A must have for the IRS Cobras if you want to turn

    I put these on my cobra and had to do quite a bit of adjusting and a little bit of grinding to get these to fit. That being said, the kit is very well built and these were a huge improvement to my IRS Cobra. Some of the best money I've spent on the car.


    Year: 1999 Submodel: Cobra Cambridge, UK

    Helpful (1) (0)

  • 5/5

    Installation Time: Full Day

    April 29, 2012

    This should of been my first mod!

    Theese MM subframe connectors made a huge difference in my ride quality. My 95 GT is much more stable and comfortable to drive. It took me about 6 hours to do the prep and welding in my garage, and the fitment was dead on. I highly recommend this product and experiencing how big a difference it made, (for the price) this should be one of the first mods people should do. I'm very happy and highly recommend it.


    Year: 1995 Submodel: GT Orange county, CA

    Helpful (2) (1)

  • 5/5

    Installation Time: Shop Install

    January 27, 2012

    This product is cheap and it should be the first thing you get

    When I drove my car it felt like I'm on a boat so to fix this problem I bought the maximum Motorsports full length subframe conectors. My car went from rocking and twisting to solid as a rock. You can feel the difference.


    Year: 1987 Submodel: Other Oakland CA

    Helpful (1) (0)

  • 5/5

    Installation Time: Shop Install

    September 27, 2011

    Full Length Subframe Connectors

    These Maximum Motorsports are great! I do recommend a shop to install these, as you will need to get these welded in. If you have access to a welder, then you can do yourself. Will take some time for the install. Traction times have been great! Chassis feels stiffer!


    Year: 1990 Submodel: Other Elverson, PA

    Helpful (1) (0)

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