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WELD your Subframe Connectors!

This is a discussion on WELD your Subframe Connectors! within the Suspension and Handling forums, part of the General Help category; I have had (BOLT ON) 3 point UMI Subframe connectors on my car since August 2007. They definitely made a ...

  1. #1
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    WELD your Subframe Connectors!

    I have had (BOLT ON) 3 point UMI Subframe connectors on my car since August 2007. They definitely made a difference. They tightened the whole car up and I noticed less squeaks and rattles (especially the T-tops). I also noticed that when I would put the car on a 2 post lift, the doors would open and close much easier vs. before they felt like they were miss aligned.

    Last night I welded the subrame connectors on and took it for a drive down some rough roads. I heard no rattles from the T-tops and no squeaks. It was a total night and day difference. I can now put the car up on the lift and the doors will open and close the same as they would if the car was on all 4 wheels.

    Just make sure you guys weld the subframe connectors on while the suspension is loaded (car on all 4 wheel).

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    i have not noticed my SFCs moving around.......took them off not to long ago and there was no signs of movement.........glad i was able to take them off

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    Quote Originally Posted by sjsingle1 View Post
    i have not noticed my SFCs moving around.......took them off not to long ago and there was no signs of movement.........glad i was able to take them off
    There will not be any signs of movement. I didn't notice any rub marks where the braces contacted the chassis. Like I said, most peeps can't imagine the difference between bolted on and welded.

    Why would you need to take them off anyway?

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    i took them off when i drilled out the front bolt hole for the LCAs to 1/2............the UMI SFC holes were already 1/2 as i found out......but still it was good that i could remove them
    Last edited by sjsingle1; 02-28-2011 at 05:12 PM.

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    No question that welding them would add to the structural integrity. I just don't want to mess up the pretty underside of our car.

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    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    I hear ya. I guess that I am addicted to the, no squeaks solid chassis that now handles like is got a full frame. The car feels totally solid and now I can say that having them bolted on allowed a lot of flex.

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    Senior Member JayTA98's Avatar
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    you can't beat the handling and feeling of a solid chassis car. I love my SFC as well.

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    i want the uni bolt on 3 points but i have mac headers and y , will they fit fine together?

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    I just have the 2-pts so mine never get in the way

    Never been in a car with bolt-on SFCs so I don't know how that feels, but I know with my current set-up, my car feels 100% solid.
    It's on jackstands.

  10. #10
    2004 HEAD/CAM CTS-V 9t8z28's Avatar
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    3 point subframe connectors do not get in the way of anything. There are very few brands out there that might not be designed as good as the UMI or BMR. I have run some pretty crazy exhaust systems on my car and not one time was the SFC in the way.

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