A Dirt King lower control arm upgrade replaces your truck's factory suspension parts with aftermarket arms designed for off-road use
The lower control arms on your Tacoma connect the wheel hub to the frame and control how the wheel moves up and down. Factory arms work fine on pavement, but they have limits: they're built for comfort and cost, not for the angles and forces that come with rock crawling, desert driving, or rough terrain. A Dirt King upgrade swaps these for arms with a different geometry — usually a longer design that increases suspension travel and changes how the wheel articulates when the suspension compresses.
The main reason people install them is to get more suspension movement without the wheel hitting the truck's body or frame. When you're climbing over rocks or dropping into a wash, that extra range of motion keeps all four wheels on the ground longer, which means better traction and less chance of getting stuck. The longer arms also tend to reduce the angle at which the suspension operates, which can reduce wear on joints and bushings over time.
Key Takeaways
- Dirt King lower control arms are longer than factory arms and allow your suspension to move through a greater range before the wheel hits the frame.
- The upgrade is most useful if you drive off-road regularly or plan to lift your truck higher than a few inches.
- Installation requires removing the wheel, unbolting the factory arm, and bolting in the new one — a job most shops can do in a few hours per side.
- The change in suspension geometry may require a wheel alignment afterward, and you may notice a slight change in how the truck handles on pavement.
- Cost typically ranges from several hundred to over a thousand dollars depending on whether you install them yourself or pay a shop, and whether you replace both front arms or all four.
How suspension geometry changes with longer control arms
Your Tacoma's suspension works like a four-bar linkage: the lower control arm, upper control arm, frame, and axle form a shape that changes as the suspension moves. When you make the lower arm longer, you change the angles at which everything moves. The wheel's path through space becomes different — it travels more vertically and less inward as the suspension compresses.
This matters because factory arms are a compromise. They're angled to give you a comfortable ride on the highway and predictable handling in normal driving. Off-road, that geometry works against you: as the suspension compresses on uneven ground, the wheel can move inward and upward in ways that cause it to hit the frame or fender. A longer lower arm reduces that inward movement, so the wheel stays under the truck longer before it runs out of travel.
The geometry change also affects the truck's ride height and stance. Longer arms can change the angle at which the suspension sits at rest, which is why some people pair them with a lift kit. If you're just installing the arms without other changes, your truck's ride height may shift slightly — usually down a bit, though this varies by design.
When you need this upgrade versus when you don't
If you drive your Tacoma on pavement almost exclusively and rarely encounter rough terrain, a lower control arm upgrade is not necessary. Factory arms are engineered to work fine for normal driving, and changing them will not improve comfort or handling on the road — it may actually make the ride feel different in ways you don't want.
You're a good candidate for this upgrade if you do any of the following: rock crawl or boulder-hop regularly, drive in washes or creek beds, plan to lift your truck more than two inches, or run larger tires that need more suspension clearance. The upgrade becomes more valuable the more aggressive your off-road driving is. If you're doing light trail driving on maintained roads, you may not need it. If you're climbing rocks or dropping into deep ruts, it becomes a real advantage.
The upgrade also makes sense if you're already investing in other suspension work — a lift kit, new shocks, or a full suspension rebuild. Doing the arms at the same time is cheaper than doing them separately, and they work together to give you the full benefit of increased suspension travel.
Installation: what the job involves and what it costs
A lower control arm replacement is a straightforward bolt-on job, but it does require some mechanical work. The process is the same for each arm: remove the wheel, unbolt the arm from the frame and the steering knuckle or axle housing, and bolt the new one in place. Most shops can do both front arms in two to four hours. If you're replacing all four arms (front and rear), add another two to three hours.
The cost depends on whether you do the work yourself or hire a shop. A single Dirt King lower control arm costs somewhere in the range of $150 to $400, depending on the model and where you buy it. If you buy a pair (left and right) for the front, you're looking at $300 to $800 in parts. A shop will charge labor on top of that — typically $100 to $200 per hour, so $200 to $800 in labor for both front arms. Some shops bundle suspension work and may offer a discount if you're doing multiple upgrades at once.
If you have mechanical experience and the right tools, you can do this yourself and save the labor cost. You'll need a jack, jack stands, a socket set, and possibly a ball joint separator if the arm doesn't come free easily. If you're not comfortable working under the truck, a shop is the safer choice.
Alignment and how the truck will feel afterward
After installing new lower control arms, you should get a wheel alignment. The change in suspension geometry shifts where your wheels point, and driving on misaligned wheels wears tires faster and can affect handling. A full four-wheel alignment typically costs $100 to $200 and takes an hour or two.
You may notice changes in how the truck feels on pavement after the upgrade. Some people report a slightly softer or more compliant ride, especially if the new arms have different bushing materials than the factory ones. Others notice the truck sits a bit lower or that the steering feels slightly different. These changes are usually minor and most drivers adapt quickly. If the change feels wrong — pulling to one side, excessive bouncing, or clunking noises — have a shop check the installation and alignment.
Off-road, the difference is usually more noticeable. The truck will articulate more smoothly over obstacles, and you'll feel the suspension working through a greater range. Wheels stay planted longer, and the truck feels more stable on uneven ground.
Dirt King brand and alternatives
Dirt King is one of several manufacturers making aftermarket lower control arms for the Tacoma. Other common brands include Baja Designs, Total Chaos, and Icon Vehicle Dynamics. Each has slightly different geometry, materials, and price points. Dirt King arms are generally considered a solid mid-range option — good quality and reasonable cost, without the premium price of some competitors.
When choosing between brands, look at the specific geometry for your truck's generation (second-gen, third-gen, etc.) and what you plan to do with it. Some arms are designed more for mild lifting and trail driving, others for aggressive rock crawling. Reading reviews from people doing the same kind of driving you do will give you a better sense of which brand fits your needs.
If you're on a tight budget, some people upgrade just the front arms first and add rear arms later. The front arms make the biggest difference in suspension travel, so starting there is a reasonable approach.
Frequently Asked Questions
Do I need to replace all four arms at once?
No. Many people start with the front two and add rear arms later. The front arms have the biggest effect on suspension travel and articulation, so upgrading them first gives you the most benefit for the money. You can add rear arms whenever your budget allows.
Will this upgrade affect my truck's warranty?
Suspension modifications typically void the suspension portion of your warranty, though the rest of the truck's warranty may remain intact. Check your warranty documents or ask your dealer before you install anything. If your truck is still under warranty and you want to keep it that way, suspension upgrades are not the right choice.
Can I install these myself if I've never worked on suspension before?
It's possible but not recommended without experience. The job requires safely lifting the truck, removing and installing bolts under load, and getting everything torqued to the right specification. If something goes wrong, you could damage the truck or create a safety issue. A shop is the safer choice if you're new to this work.
How much suspension travel do I actually gain?
The amount varies by design and depends on what was limiting your travel before. In general, longer lower control arms can add one to three inches of additional suspension compression travel, though the real-world benefit depends on your truck's other components and how you drive it. A shop or the manufacturer can give you a more specific number for your setup.
Do these arms work with a stock suspension, or do I need a lift kit?
They work with a stock suspension, though you'll get more benefit from them if you're also lifting the truck or upgrading shocks. On a completely stock truck, the arms will improve off-road articulation but won't dramatically change how the truck performs. They're most valuable as part of a larger suspension upgrade.