backed by a lifetime guarantee

4Runner

Whether you’re towing gear, tackling tough trails, or traveling long distances, our suspension upgrades are built to give your 4Runner the load support, stability, and comfort made for the way you drive.

Why 4Runner Owners Upgrade
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Purpose-built suspension solutions for Toyota’s most capable SUV.

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No More Rear-End Sag

Stay level even under heavy load or while towing. Our solutions eliminate rear sag so your Toyota drives like it’s unloaded.

Off-Road Impact Cushioning

Soften harsh bumps and protect your suspension on trails with progressive bump stops.

Sway & Roll Control

 Reduce body roll when cornering and keep sway in check when towing or carrying roof

DIY Install in Your Driveway

Every product installs with basic tools and no cutting. Spend less time in the shop and more time on the road.

Our most popular kits for load handling, sway control, and ride comfort.

4Runner Suspension, Made Smarter

Whether you’re building an overland rig, towing a small trailer, or loading up for a road trip, these upgrades enhance your 4Runner’s performance without sacrificing comfort or articulation.

Featured Products:
✅ SumoSprings Solo – Progressive bump stops for added load support and sway control.
✅ Coil SumoSprings – Inserts into factory coil springs to reduce sag and improve handling.
✅ Trailer SumoSprings – Improves stability and reduces trailer bounce for towing setups.

Find the Right Kit for You

Perfect Fit, No Compromise

Designed for every 4Runner generation, from classic off-roaders to the latest models.
Every kit is engineered to match your 4Runner’s frame and suspension geometry, keeping factory handling intact while adding the support you need for towing, hauling, and trail adventures. No spacers. No cutting. Just bolt-on performance.
Find the Right Kit for You

What Our Customers Are Saying

These are great when going off the beaten path, no more creaking and groaning over washboards. Speed bumps? Smooth as silk. The runner flows over bumps, potholes, and washouts with ease. Love these suspension upgrades !!!

John C Porter

Toyota 4Runner

These are great and super easy to install. I’m running front and rear bump stops with an ICON Stage 4 suspension and 285/70R/17 AT tires. A week after install, I took the 4Runner to Big Bend National Park and hit back roads full of whoops and washboards. The bump stops made the rebound smooth as butter, keeping the 4Runner planted at 30–40 mph with zero loss of control. If you’re on the fence, buy with confidence—ordering was simple and shipping was faster than expected.

James Vignali

Toyota 4Runner

I bought these to help my 2021 4Runner tow my 2022 Airstream Basecamp 16X after my airbags failed. The difference was immediate — the springs greatly reduced sag and improved overall stability while towing. I can now lift the trailer off the ball even on unlevel terrain without struggle, and the ride feels more confident and secure. They’ve truly transformed my towing experience.

Nadia Melim

2021 Toyota 4Runner

Engineered for Every 4Runner Lifestyle

From weekend warriors to long-haul travelers, our suspension upgrades are built for how you use your 4Runner.

Family Road Trips

Keep passengers comfortable and your ride level, even when fully loaded.

Light Towing

Tow small campers, boats, or utility trailers with more control and less sway.

Overland Adventures

Carry rooftop tents, gear, and supplies without losing ride height or stability.

Daily Driving with Gear

Smooth, stable driving for commutes and weekend adventures alike.

Adventure, Comfort, and Control — All in One Upgrade

Upgrade Your 4Runner Today

Your 4Runner is ready for anything. With the right suspension upgrades, you can keep it stable, comfortable, and capable for every trip, load, and trail ahead.

Find the Right Kit for You

Explore Other Toyota Suspension Upgrades

Find bolt-on suspension solutions for our other top models.

Toyota Tacoma

Level out your load, reduce sway, and gain control — whether you’re hauling gear for work or heading off-road for the weekend.

Toyota Tundra

Big truck, bigger capability. Upgrade your Tundra’s suspension to handle towing, hauling, and daily driving without compromise.

Find the Right Kit for You

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