Rust Buster Rear Hitch Crossmember For 4Runner/FJ Cruiser/GX470 RB8423

RB8423
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  • Fits 2003-2009 Toyota 4Runner
  • Fits 2003-2009 Lexus GX470
  • Fits 2007-2014 Toyota FJ Cruiser
  • Fits both V6 & V8 Models
  • Measures 41.00" in Length
  • Installs at the rear of the frame
  • Made from Heavy-Duty 11 Gauge Steel
  • CNC bent for precise fit
  • Will need to drill holes if installing Hitch
  • Welding required
  • OE Part Number 51209-35211
  • Protect with Rust Buster Rust Converter Paint RB9917
  • Welding Required
  • Ships with an oil protective coating to prevent oxidation during transit
  • Backed by our Lifetime Warranty

If you're a proud owner of a Toyota 4Runner or FJ Cruiser, you're already familiar with its unparalleled blend of rugged durability, exceptional 4WD capabilities, and a ride quality that rivals many passenger cars. These features, along with its virtually indestructible engines and a hard-wearing interior, ensure your 4Runner/FJ Cruiser retains its value and remains highly sought after. However, the notorious issue of premature and excessive rust can mar this otherwise stellar reputation. That's where Rust Buster Frameworks steps in. We're dedicated to ensuring your 4Runner/FJ Cruiser overcomes this hurdle, helping you maintain its integrity and keep it adventuring on the roads for years to come. Trust us to be the shield against rust, safeguarding your investment and your journeys ahead.

By utilizing the latest in Scanner Solutions and CAD Software Rust Busters crack engineering team is able to capture your specific model truck's frame contours down to the smallest detail. We take a Modern Approach and tailors each frame section to fit your vehicle and application with the unique vision that puts Fitment, Installation Ease and OE compatibility to the top of our priority list. We strive to set ourselves apart from the competition by being better in every area the current market has to offer, with a combined 45 of experience under Rust Busters Engineering staff we are here to put an end to all your rust issues.  Because of this, we back all of our frame pieces with a Lifetime Warranty.


Installation Instructions

Downloadable PDF: RB8423 Installation Instructions.pdf

Inventory Last Updated: Mar 12, 2025
California Residents: Prop 65 Warning

Customer Reviews

Based on 3 reviews
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Eduardo Matta
Top Notch!

Placed my order on a Tuesday and got my crossmember in two days. Absolutely amazed by how fast this was delivered. I am defiantly will order more stuff from this company.
Thank you and keep up the great quality parts and service.

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Eric Carmel
Perfect Fit

Was able to cut out the old section with a plasma cutter and weld in this new one without removing the body off the frame. Ended up needing to box the ends of the frame rails afterwards, but that was due to rust. Only annoying thing were the holes for the hitch bolts are merely pilot holes, and due to the way the piece is welded the weld itself prevents the hitch from sitting flush on the back of the crossmember. I ended up shimming it with a plate and welding the hitch onto the crossmember directly, but your mileage may vary. Well made and shipped very quickly with the piece readily in stock.

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Shane Howell
Amazing and quality made parts!

These premade frame sections made it easier for my garage to repair my 4Runner frame and keep it on the road!