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  1. #1
    I Write E85 Stickies Frosty's Avatar
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    Default The Addco rear sway bar is not dead!

    The general consensus from what I read was that the big thick shiny black Addco rear sway bar was out of production and no more. Well im bad at taking no for an answer and I wanted oversteer in a FWD car so I called them up. A really nice lady answered and after asking if they had any 639 bars in stock she walked to the warehouse and checked for me. Turns out they still have all of the jigs and stuff to make them AND had 4 or 5 just sitting there! They were missing a few bar clamps so she put them on order. I then officially ordered one from summit racing. A couple months later the backordered bar clamps showed up and they shipped me my bar! It bolted in with all of the factory mounts and everything! The best part? The long awaited bar clamps wouldn't fit on my car anyways... lol. Now combine this bar with my Doorman front sway bar, ZZP strut tower braces, zzp trailing arms, KYB GR2 struts, Saggy stock springs in the front, heightening springs / heavy load springs in the rear, and 245/50R16 Riken Raptor ZR tires on stock rims. The GMPP bar feels like a limp noodle in comparison and the rear end feels 10X tighter after swapping. I now have a grand prix that easily out-handles everything that has dared try to keep up with me on my favorite stretch of windy road. One mildly built cobalt SS even lost control and ended up flying off the road he was trying so hard to keep up. Still wasn't even close. Best part? It will now oversteer on occasion and I giggled like a little girl the first time it happened. Then I gave 3 different car buddies rides and they all had the same reaction. It feels so wrong that its just hard not to smile! Now who wants to see me enter a w-body into an auto X competition?

    Link to sway bar. http://www.summitracing.com/parts/aco-639

    Picture time!

    Lol warnings. Apparently oversteer kills soccer moms.



    Bar by itself



    Compaired to your average sharpie



    GMPP bar vs Addco





    Installed! No clearance issues. 45 minutes from tools out to tools put away.





    Bonus link to a video of me trying to melt my headers because why not?
    http://youtu.be/PB6go96wcso
    "Lets just throw more boost at it and see what happens" -Frosty
    The Defacto Guide to tuning your car for E85. Read it and learn.



    I love Decker<3

  2. #2
    GTP Level Member nik12937's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Thanks for posting the part number, I was looking for it last week and must have deleted my old notepad with compiled part numbers.

    Out of curiosity, did the bar come with poly bushings? I've got some Energy Suspension bushings on my GMPP bar now, they almost make as much difference as the bar itself! I had to make inserts to sit under the bushings since they don't have that curved shape like the stock ones, I wonder if that's an 04+ thing. I recall seeing someone shave/grind down the bar clamps to fit properly, I know they can cause a clunking noise if they aren't ground down enough. They would probably make quite a difference though.

    That bar and some rebuildable Bilsteins are the last suspension components on my wish list, the GMPP bar doesn't cope with the subwoofers and battery all that well. Congrats on that beast sway bar!
    Last edited by nik12937; 01-28-2015 at 03:48 AM.
    For thine is the Cam, The Piston, and The Rod, Forever and ever (or until they break). Amen.

  3. #3
    Moderator BillBoost37's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    You lost me when you didn't swap out your lateral arms and toe links. Shame you aren't closer, you and I would have fun pushing our crap boxes through twisted roads.


    2010 Audi A6 Dual IC's

  4. #4
    I Write E85 Stickies Frosty's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Those are next bill. Never fear! The butt end of this thing already feels so tight I wont know what to do with it after swapping those last few stock parts. Someone told me to get tubular control arms up front... I laughed and laughed. Winter + exposed joints = bad. My acdelco arms are plenty.
    "Lets just throw more boost at it and see what happens" -Frosty
    The Defacto Guide to tuning your car for E85. Read it and learn.



    I love Decker<3

  5. #5
    Moderator BillBoost37's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    I have dormans up front. GMPP bar up front with urethane everything. GMPP in the rear with urethane as well. Then the HT MS tubuars with urethane for all rear bars/links. F & R STB's, a set of 18" lucerne wheels with super stickies on them. She corners


    2010 Audi A6 Dual IC's

  6. #6
    I Write E85 Stickies Frosty's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Yessssssssss. I love throwing these derpy cars around corners.
    "Lets just throw more boost at it and see what happens" -Frosty
    The Defacto Guide to tuning your car for E85. Read it and learn.



    I love Decker<3

  7. #7
    Moderator BillBoost37's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Tis funny seeing people figure that you should be off the road against a tree...meanwhile you are still hugging the road as good as a pile of crap can.


    2010 Audi A6 Dual IC's

  8. #8
    Schooner Tuner ADrugDealer's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    and here I am just like I wonder how fast I can get from here to there as straight as possible.
    2008 G8 GT - IOM - LSA Blower, Intercooled, Ported Heads, Cam, Flex Fuel Conversion, Tuned - 550whp - 11.5 @ 124 -
    2000 Regal - Winter Beater

  9. #9
    Donating Users 16MustangVet's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    fvck yes i want one good job OP!!
    i too thought these would be like finding a unicorn.......

  10. #10
    Moderator BillBoost37's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    You were gonna drive to Gregs house to look for sway bars?


    2010 Audi A6 Dual IC's

  11. #11
    GTX Level Member nos4blood70's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Now if only there was something like this for us H-body dudes. Always left out and ****.
    -Carl
    "Penelope" - 145k Miles 2003 Bonneville SLE



  12. #12
    Schooner Tuner ADrugDealer's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Fab your own lol. Jig, metal, torch, hammar lol
    2008 G8 GT - IOM - LSA Blower, Intercooled, Ported Heads, Cam, Flex Fuel Conversion, Tuned - 550whp - 11.5 @ 124 -
    2000 Regal - Winter Beater

  13. #13
    I Write E85 Stickies Frosty's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Check the application guide on their site... Looks like there is one listed for G-Bodies. http://www.addco.net/aftermarket/catalog/pontiac/
    "Lets just throw more boost at it and see what happens" -Frosty
    The Defacto Guide to tuning your car for E85. Read it and learn.



    I love Decker<3

  14. #14
    GrandPrix Junkie CrazyGuy03's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Really that big of a differnce coming from a GMPP bar?
    2003 Buick Regal GSX lots of mods - click here to see latest build - http://www.grandprixforums.net/threa...ld-for-the-gsx

    *For Reference - Does not have a Zack Howard Cam - It's an Intense Stage 3 - Thank You*

  15. #15
    I Write E85 Stickies Frosty's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Huge... Giant difference.
    "Lets just throw more boost at it and see what happens" -Frosty
    The Defacto Guide to tuning your car for E85. Read it and learn.



    I love Decker<3

  16. #16
    Moderator BillBoost37's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Quote Originally Posted by nos4blood70 View Post
    Now if only there was something like this for us H-body dudes. Always left out and ****.
    So not left out.. Just need to research.


    2010 Audi A6 Dual IC's

  17. #17
    GrandPrix Junkie CrazyGuy03's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Wish I would have known when I did my suspension. I thought the gmpp was it
    2003 Buick Regal GSX lots of mods - click here to see latest build - http://www.grandprixforums.net/threa...ld-for-the-gsx

    *For Reference - Does not have a Zack Howard Cam - It's an Intense Stage 3 - Thank You*

  18. #18
    I live here. theaceofspades's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Subbed this is awesome
    Quote Originally Posted by theaceofspades View Post
    I now own a stance car parts I just like them DICKS

  19. #19
    Donating Users 16MustangVet's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    Quote Originally Posted by BillBoost37 View Post
    You were gonna drive to Gregs house to look for sway bars?
    I said unicorns not unobtanium parts...... LOL

  20. #20
    Schooner Tuner ADrugDealer's Avatar
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    Default Re: The Addco rear sway bar is not dead!

    I like unicorns
    2008 G8 GT - IOM - LSA Blower, Intercooled, Ported Heads, Cam, Flex Fuel Conversion, Tuned - 550whp - 11.5 @ 124 -
    2000 Regal - Winter Beater

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