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Kartboy Rear Subframe Lockdown Bolts - Subaru Models (inc. 2002-2007 WRX/STi)
Kartboy Rear Subframe Lockdown Bolts - Subaru Models (inc. 2002-2007 WRX/STi)
Kartboy Rear Subframe Lockdown Bolts - Subaru Models (inc. 2002-2007 WRX/STi)
Kartboy Rear Subframe Lockdown Bolts - Subaru Models (inc. 2002-2007 WRX/STi)
Kartboy Rear Subframe Lockdown Bolts - Subaru Models (inc. 2002-2007 WRX/STi)
Kartboy Rear Subframe Lockdown Bolts - Subaru Models (inc. 2002-2007 WRX/STi)
Kartboy Rear Subframe Lockdown Bolts - Subaru Models (inc. 2002-2007 WRX/STi)
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User Media for: Kartboy Rear Subframe Lockdown Bolts - Subaru Models (inc. 2002-2007 WRX/STi)

Kartboy Rear Subframe Lockdown Bolts

Subaru Models (inc. 2002-2007 WRX/STi)


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Features & Product Details

RallySport Direct proudly carries a great selection of quality engineered drivetrain, suspension, and performance upgrades and accessories brought to you by Kartboy.


These are the Kartboy Rear Subframe Lockdown Bolts. It is common for the rear subframe to have excessive movement under lateral loads, and Kartboy helps to relieve this issue with their Rear Subframe Lockdown Bolts. This kit includes a pair of bolts that are installed into sleeves that will keep your subframe locked in place without the risk of affecting your alignment among other things that can happen once our factory subframe bolts come loose. 



  • Includes (2) bolts, washers, and sleeves
  • Designed to help lock the rear subframe in place without changing your alignment
  • Reduces excessive movement
  • Installation is simple and can be performed with proper ratchets and sockets


    Product Video


    Brand: Kartboy
    Adjustable: No
    Material: Steel / Aluminum
    QTY: 2
    Mfgr. Warranty: Limited Lifetime Warranty
    Condition: New Product
    Return Policy:



    40 Reviews
    4.7 out of 5 Stars
    5 Stars
    4 Stars
    3 Stars
    2 Stars
    1 Stars
    Customer Photos and Videos
    Kartboy Rear Subframe Lockdown Bolts ( Part Number: KB-066)
    Why not? 1 year ago
    5out of 5stars
    For the price and easy install, this became a 'Why not?' purchase. Not as big of an upgrade as I have read from others, but with all the other suspension upgrades/improvements I have, this fell into my cart. Happy with the things I did notice and helps with the extra weight of the wagon body style.
    Was this review helpful?
    GREAT upgrade for GD chassis turbo models 2 years ago
    5out of 5stars
    These are such a relatively inexpensive and impactful addition to your rear subframe suspension. Key things to note are to use an m12 x 1.25 tap and tapping fluid to clean out and recut the threads just from all the rust and road debris that gets kicked up inside the threads (it will save you a headache most likely) and loosening the 4 subframe bolts located just next to the thread holes to make sure everything seats together niecly. I used anti-seize on the bolts before I put them in and torqued the lockdown bolts to 60ft-lbs before re tightening the subframe bolts to 90 ft-lbs going back around to all bolts after everything was put back in just to make sure everything was all tightened to spec. Let me tell oyu how much of a difference it feels like. side to side movement is sturdy and solid with virtually no body roll anymore, upon start up (for my car atleast) there is no shutter in the rear by the diff. from everything being loose, throttle repsonse is a little better seeing as how the rear is now secured down to the frame. I would highly recommend anyone with an 02-07 GD chassis to invest in these, they are incredibly worth it and take about 30 minutes to install.
    Was this review helpful?
    Mandatory GD chassis mod 2 years ago
    5out of 5stars
    Of all of my bushing upgrades, this was probably the easiest to install. It also added very noticeable rigidity to the entire car. Its easy, cheap, and noticeably improves the feel of the car. Stop reading reviews and just add these bolts to your next order!
    Was this review helpful?
    Two piece design 3 years ago
    5out of 5stars
    The two piece design allows for the collar to stay in place while the bolt is tightened. Much better than the one piece imo
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    1 of 3 people found the following review helpful
    Don't fit N/a models 8 years ago
    1out of 5stars
    Contrary to the confirmed fitment for my 2002 TS, these bolts DO NOT fit as my rear subframe capture nut hole is too small to accept the M12x1,25 bolt. After measuring, it turns out mine is M10x1,25. Also confirmed on a friends 04 TS wagon as well...... So 1 Star rating for misleading confirmed fitment.....
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    • Q: Tap Needed?  JoshSti5 years ago

      Do I really need a Tap for my 2005 STi to install this Kartboy Subframe Lockdown bolts? Please advise.
      • 4 of 4 people found the following answer helpful

        A:  It is not required to, however, because your car is a bit older, you may want to consider using a chaser tap to clean up the threads before you install these. The holes where these are installed are threaded from the factory but there are no bolts that are installed from the factory so the holes are exposed and can get dirty over time.

        Karsten B. @ RallySport Direct 5 years ago  
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    • Q: fitment  keykuts6 years ago

      in the fitment chart its listed that these fit a 99 impreza rs, but in the comments its listed that these are for 02 and up.will these bolt right up to my 99 rs?thanks
      • 0 of 0 people found the following answer helpful

        A:  Yes, these would work with no issues on your 99 RS. Just make sure to clean off the threads on the vehicle side to ensure they are free from rust and other grime.

        Brady R @ RallySport Direct 6 years ago  
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    • Q: Susp. height  hrvelez10 years ago

      Does this bolts get the suspension 1/4 lower as stated on the reviews?
      • 2 of 2 people found the following answer helpful

        A:  Kartboy has confirmed that these bolts should not have any affect on the suspension height because the the subframe is already locked down on height. The bolts are intended to eliminate movement rather than compress the subframe to the body.

        Zach G. @ RallySport Direct 10 years ago  
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      • 0 of 0 people found the following answer helpful

        A:  No, those should retain the factory ride height. thanks, Cole

        colekelson @
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    • Q: Tap size  nyfitter63811 years ago

      If I could get my hands on a tap, what size tap would I use for these threads?
      • 1 of 5 people found the following answer helpful

        A:  According to my chart here these bolts would use an M14x1.25 tap.

        Tanner S. @ RallySport Direct 11 years ago  
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      • 3 of 3 people found the following answer helpful

        A:  The tap needed on my 03 WRX was a M12x1.25. I followed the advice and first bought the size 14 and it was too big. FYI, save yourself an extra trip to the hardware store.

        Was this answer helpful?
      • 1 of 1 people found the following answer helpful

        A:  Don't give false information about the parts you're selling if you don't know what you're selling Tanner it's an M12 by 1.25 for the cart boy Botox bolts if anybody else wondered

        Was this answer helpful?

    This Part Fits

    Subaru Impreza
    2006 Subaru Impreza 2.5i
    2007 Subaru Impreza 2.5i
    1993 Subaru Impreza Base
    1994 Subaru Impreza Base
    1995 Subaru Impreza Base
    1996 Subaru Impreza Brighton
    1997 Subaru Impreza Brighton
    1993 Subaru Impreza L
    1994 Subaru Impreza L
    1995 Subaru Impreza L
    1996 Subaru Impreza L
    1997 Subaru Impreza L
    1998 Subaru Impreza L
    1999 Subaru Impreza L
    2000 Subaru Impreza L
    2001 Subaru Impreza L
    1993 Subaru Impreza LS
    1994 Subaru Impreza LS
    1995 Subaru Impreza LX
    1996 Subaru Impreza LX
    1995 Subaru Impreza Outback
    1996 Subaru Impreza Outback
    1997 Subaru Impreza Outback
    1998 Subaru Impreza Outback
    1999 Subaru Impreza Outback
    2000 Subaru Impreza Outback
    2001 Subaru Impreza Outback
    2002 Subaru Impreza Outback
    2003 Subaru Impreza Outback
    2004 Subaru Impreza Outback
    Outback Sport
    2005 Subaru Impreza Outback Sport
    2006 Subaru Impreza Outback Sport
    2007 Subaru Impreza Outback Sport
    1998 Subaru Impreza RS
    1999 Subaru Impreza RS
    2000 Subaru Impreza RS
    2001 Subaru Impreza RS
    2002 Subaru Impreza RS
    2003 Subaru Impreza RS
    2004 Subaru Impreza RS
    2005 Subaru Impreza RS
    2002 Subaru Impreza TS
    2003 Subaru Impreza TS
    2004 Subaru Impreza TS
    2002 Subaru Impreza WRX
    2003 Subaru Impreza WRX
    2004 Subaru Impreza WRX
    2005 Subaru Impreza WRX
    2006 Subaru Impreza WRX
    2007 Subaru Impreza WRX
    WRX Limited
    2006 Subaru Impreza WRX Limited
    2007 Subaru Impreza WRX Limited
    2004 Subaru Impreza WRX STI
    2005 Subaru Impreza WRX STI
    2006 Subaru Impreza WRX STI
    2007 Subaru Impreza WRX STI
    WRX STI Limited
    2007 Subaru Impreza WRX STI Limited
    WRX TR
    2006 Subaru Impreza WRX TR
    2007 Subaru Impreza WRX TR