If you've been researching steering rack upgrades for your 4Runner, Tacoma, FJ Cruiser, or GX, you've probably come across the "Tundra rack swap." It's been the go-to mod for years, where builders pull a used Tundra rack and stuff it into a smaller Toyota chassis. But it comes with real tradeoffs that most people don't talk about until they're fighting an alignment or wondering why their steering still feels off.
That's exactly why we built the Toyo-Steering billet rack from scratch.
What is a billet steering rack?
"Billet" refers to how the parts are made, machined from a solid block of metal rather than cast or formed. Casting is faster and cheaper, but machining from billet gives tighter tolerances and more precise geometry. In a steering rack, that precision matters. The position of the bore axis, pinion angle, and rack width all have to be exactly right for the rack to work correctly in your specific chassis, and that's where legacy Tundra swaps fall short.
The problem with modified Tundra racks
The traditional Tundra rack swap works like this: someone pulls a used Tundra rack, modifies it, and sells it as an upgrade for 4Runner, Tacoma, FJ Cruiser, or GX platforms. The appeal is the Tundra's stronger 38mm shaft and components compared to the stock 30mm shaft in these platforms.
The problem is everything else.
The Tundra rack housing was designed for the Tundra chassis, not yours. The bore axis isn't aligned correctly relative to the mounting points on your frame. The pinion angle is off. The rack width isn't optimized for your application. Shops end up working around these geometry mismatches, and the result is an alignment that never quite sits right, or steering that still has a vague quality to it even after the swap.
You swapped out one compromised setup for a different one.
How the Toyo-Steering billet rack solves this
We didn't modify a Tundra rack. We engineered a new one.
The billet rack uses Tundra internals, so you get that 38mm shaft and upgraded features, but the housing is purpose-built for your chassis. Bore axis, pinion angle, and rack width are all correct for the vehicle the rack is going into. Housings are produced in batches so tolerances are consistent across every unit, and each rack is assembled to order for your specific vehicle.
The result is a rack that installs cleanly, aligns correctly, and feels right because it was actually designed for your truck.
This is what trail4runner.com noted in their first look coverage in April 2026: the billet rack addresses the core alignment and geometry issues that have plagued modified Tundra rack swaps since the beginning.
What vehicles does it fit?
The billet rack is currently available for:
- 2003–2009 4Runner (4th gen)
- 2010–2024 4Runner (5th gen)
- 2016–2023 Tacoma (3rd gen)
- 2007–2014 FJ Cruiser
- Lexus GX470
- Lexus GX460
Note for Tacoma owners: installation requires a shortened intermediate shaft which is included. Everything else is a direct bolt-in.
Frequently asked questions
Is this a direct bolt-in? Yes. For 4Runner, FJ Cruiser, and GX platforms this is a straightforward bolt-in swap. Tacoma installs require a shortened intermediate shaft, but no frame modifications or fabrication beyond that.
Do I need an alignment after install? Yes, always. Any steering rack replacement requires a fresh alignment. The advantage of the billet rack is that the geometry is correct going in, so your alignment tech isn't fighting the rack to get the numbers right.
What's the warranty? Contact us directly for current warranty terms.
How long does it take to ship? Each rack is assembled to order and lead times vary. Reach out before placing your order if timing is critical.
The bottom line
The Tundra rack swap became popular because it was the best option available. The billet rack exists because "best available" wasn't good enough. If you're building a rig meant to actually perform off-road, the geometry needs to be right from the start.
Browse billet rack kits by vehicle:
- '10–'24 4Runner Billet Tundra Conversion Rack Kit
- '03–'09 4Runner Billet Tundra Conversion Rack Kit
- '16–'23 Tacoma Billet Tundra Conversion Rack Kit
- '07–'09 FJ Cruiser Billet Tundra Conversion Rack Kit
- '10+ FJ Cruiser Billet Tundra Conversion Rack Kit
Questions about fitment? Contact us.