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    Results 1 to 9 of 9
    1. #1
      Join Date
      Feb 2011
      Posts
      284

      A-Body Lower Front Arms

      Who all offers front lower control arms that revise the geometry? Stock geometry combined with modern caster will not center the wheel in the well. I like the idea of the SPC uppers with tall balljoints for adjustability, but I don't like the deep spring pockets of the SPC lowers. They hang almost 2" below the arms, and then I have them shimmed up an inch to get the correct ride height. Any alternatives?

      70 GTO - Alum 5.3/4L80e, 7875
      17 GT350


    2. #2
      Join Date
      May 2010
      Location
      kitchener,Ontario,Canada
      Posts
      2,358
      Country Flag: Canada
      Speedtech, DSE, SPC, global west, I believe ABC Performance has some just not on their site , think umi performance as well and I know I'm missing more
      Spinnin'my tires in life's fast lane

      Ryan Austin
      On twitter ... soon to be revived ...
      On Instagram ryanaustinss70

    3. #3
      Join Date
      Nov 2008
      Location
      Lawrenceburg, TN
      Posts
      4,098
      Country Flag: United States

    4. #4
      Join Date
      Feb 2011
      Posts
      284
      UMI doesn't specify whether they change the caster basis, only that they have "improved ball joint angle for lowered vehicles and the design provides additional tire clearance."
      70 GTO - Alum 5.3/4L80e, 7875
      17 GT350

    5. #5
      Join Date
      May 2010
      Location
      kitchener,Ontario,Canada
      Posts
      2,358
      Country Flag: Canada
      Then contact bmr and ask them ....yes ?
      Spinnin'my tires in life's fast lane

      Ryan Austin
      On twitter ... soon to be revived ...
      On Instagram ryanaustinss70

    6. #6
      Join Date
      Oct 2011
      Location
      Philipsburg, Pa
      Posts
      528
      Country Flag: United States
      We have stock location on our standard 4031 arms and revised location on our race arms (coming soon, test set on LeMans right now).

      ramey
      Technical Support
      UMI Performance, Inc.
      [email protected]
      814.343.6315

      Join us on Facebook!

    7. #7
      Join Date
      Sep 2005
      Posts
      49,371
      Country Flag: United States
      Quote Originally Posted by raustinss View Post
      Then contact bmr and ask them ....yes ?
      Our A-Body Arms are Corrected for Caster Geometry!

    8. #8
      Join Date
      Feb 2011
      Posts
      284
      Thank you, gentlemen.
      70 GTO - Alum 5.3/4L80e, 7875
      17 GT350

    9. #9
      Join Date
      Mar 2014
      Location
      Nebraska
      Posts
      65
      Country Flag: United States
      They move the lower ball joint forward so when you run 6 degrees caster the tire doesn't go into the wheel well or fender. The deep pocket in SPC is so it allows coil springs OR coil overs. I'm using drop springs and shims. The arms don't drop as much as the tall lower ball joints, lowering springs. The shims is from combining all the parts and giving you a cheap option to set your ride height.
      1968 Pontiac GTO pro touring LS1 T56 9"




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