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S-10 Frame Wheelbase Extension Kit For S-10 / S-15 Frames

24.90 LBS
Calculated at checkout

Product Description

If you're having a hard time finding a 118" wheel base S-10 frame, for your S-10 frame conversion, or you need to extend a S-10 frame to fit your specific project, Code 504 has now developed a solution for you! 

It is now possible to retrofit your S-10 frame with our 7 gauge weld-on frame extension kit.  Our kit comes with detailed instructions that show you how to precisely measure, cut, and extend your existing frame rails, and install our extension kit to achieve your desired wheel base.

This kit contains the following-

  • Two outer frame rail extensions
  • Four inner gussets w/ rosebud weld provisions
  • Two inner c-channels


With the use of this kit, it will allow you to make use of a 109" S-10 frame with the following Code 504 conversion kits-

  • 47-54 Chevy Short Bed
  • 47-54 Chevy Suburban and Panel Trucks
  • 48-52 Ford Short Bed
  • 41-46 Chevy Short Bed
  • 41-48 Ford Passenger Car

 Disclaimer: All pictures are shown for illustration purposes only. Actual product may vary due to product revisions and/or enhancements.

Product Videos

Extending / Reducing an S10 Frame 19:47

Building a 1947 - 1955.1 Chevrolet Short Bed and cannot find a 118" frame? Don't be discouraged. You can always extend or reduce an S10 frame to work with our kits. Whether you are building a Dodge, Ford, or Chevrolet you can use a Code 504 Extension/Reduction kit to correct the wheelbase.

  • Extending / Re...
    Building a 1947 - 1955.1 Chevrolet Short Bed and cannot find a...

Product Reviews

Write Review

  1. Frame extension good

    Posted by Ben on 29th Mar 2022

    Good kit

  2. New Frame

    Posted by Stanley K Thompson on 16th Feb 2021

    The install went well, after I squared the Channels the 90's were about 3/19 out, Scribed reference marks on both rails 14" apart, the made the Cuts cut the Channels and used the scribe marks to keep the same length ! not doing so could end up with a large error! Also marked the floor with the desired wheel base so you check and see where your at!

  3. Great customer service

    Posted by Unknown on 22nd Jul 2019

    Wonderful to talk to and willing to help you . Need more business like this!

  4. S-10 frame extension

    Posted by Roland Gibbs on 5th May 2018

    The product is well manufactured

  5. Better than new

    Posted by john s pawelko on 24th Jun 2017

    Very well thought out. The extension is now the strongest part of the frame. Best part is the instructions. I have never seen a better set of instructions for anything. This is the best purchase I have made in a long time...thanks 504

  6. S10 Extension Kit

    Posted by Hollowtop on 25th Jan 2017

    Followed the instructions and was easily able to add the wheelbase distance needed for my project. I'm not the best welder, so I tacked it in place and had a friend who is a professional do the finish welding. This kit will make the frame stronger than original if one has any concerns.

Warranty Information

Lifetime Warranty!

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