Do You Need Upper Control Arms With a Lift Kit?
Installing a lift kit changes the angles your suspension operates at, and your factory upper control arms (UCAs) weren't built for those angles. Below, we break down when upgraded UCAs are necessary, what happens if you skip them, and how to pick the right ones for your build.
What is an upper control arm, and what does it do?
An upper control arm (UCA) connects your vehicle's frame to the top of the steering knuckle, forming the upper half of your front suspension's geometry. It works together with the lower control arm to control camber (how your tires tilt in or out) and caster (steering stability) as the suspension moves up and down. On most trucks and SUVs with independent front suspension, the UCA is the single biggest factor in how your alignment holds up after a lift.
Do I need upper control arms when I install a lift kit?
It depends on how much lift you're adding. Our general guideline for TORCH Off Road kits: with suspension lifts over 3 inches, an upgraded upper control arm is typically necessary. At that height, the altered suspension geometry affects clearance and wheel alignment enough that factory arms can no longer compensate. In the 2"-3" lift range, new UCAs aren't strictly required, but we recommend them as an upgrade for improved articulation. At less than a 2” lift, factory UCAs are typically sufficient.
One exception worth noting: this guideline is based on lift kits that change suspension geometry, such as lift spacers, struts, and torsion keys. Spindle lift kits don't alter suspension travel the same way, so the required control arms may be different for a spindle lift.
TORCH Off Road upper control arms are engineered for a 2"-4" range of lift heights. Browse TORCH upper control arms to find the right fit for your build.
At what lift height do I need upper control arms?
Our general guideline for TORCH Off Road kits:
- Under 2" lift: factory UCAs are sufficient
- 2"-3" of lift: generally not required, but recommended for improved articulation
- Over 3" of lift: an upgraded UCA is typically necessary for proper clearance and wheel alignment
This guideline applies to lift kits that change suspension geometry, such as lift spacers, struts, and torsion keys. Spindle lift kits don't affect suspension geometry directly, so the requirements may be different. Exact needs can also vary by vehicle and by manufacturer, so this reflects our guidance for TORCH Off Road kits specifically.
What happens if I don't upgrade my upper control arms after a lift?
Running factory UCAs at too much lift beyond their intended range can cause:
- Uneven or accelerated tire wear, from camber that's out of spec
- A wandering or unstable steering feel at highway speed, from incorrect caster
- Reduced suspension travel, limiting how much your suspension can articulate off-road
- Faster wear on ball joints and bushings, from the added stress of exceeding factory geometry
These effects usually get worse the more lift you add, and may compound over time rather than showing up immediately.
What are the benefits of upgraded upper control arms?
Aftermarket UCAs built for lifted applications are designed to:
- Restore camber and caster at the new ride height, instead of forcing factory geometry to stretch beyond its intended range
- Increase range of motion, letting your tires stay in contact with the ground longer over uneven terrain
- Improve clearance around other suspension components at full lift and full articulation
Can I install a lift kit with factory upper control arms?
Yes, for many lift kits up to 3 inches. TORCH 2-3” leveling and lift kits are commonly installed with factory UCAs. Upgrading is a suggested improvement for articulation, not a requirement, at that lift height. Above 3 inches, factory UCAs are generally no longer sufficient, and an upgraded UCA is necessary to keep clearance and wheel alignment within spec.
Are aftermarket upper control arms hard to install?
While an experienced DIYer with the right tools can complete the job at home, getting the geometry and torque specs right matters for both safety and alignment. TORCH recommends professional installation for upper control arms, and we suggest having your UCAs installed by a qualified shop.
Which upper control arms are right for my truck?
The right UCA depends on your vehicle, your lift height, and how you plan to drive. Daily driving, occasional trail use, and serious off-roading call for different priorities in articulation and performance.
Check out our upper control arm collection to find the right fit.
If you're not sure what your build needs, please contact us. We're happy to help you figure out what's right for your truck before you buy.
Have a question about upper control arms we didn't cover? Drop it in the comments and we may add your question to this guide! -TORCH