Best 2025-2026 Toyota 4Runner UCA & Suspension Upgrades
The 2025-2026 Toyota 4Runner rides on the TNGA-F platform shared with the current Tacoma, which means the upper control arm (UCA) conversation looks a little different than it did on the outgoing 5th Gen. If you're lifting your new 4Runner or just running larger tires, getting the UCA and suspension pairing right up front will save you a trip back to the alignment shop.
Why Upgrade Your UCAs in the First Place
Stock upper control arms on the 2025-2026 platform are built around factory ride height and factory tire size. Add a 2-3" lift or upsize your wheels and tires, and you'll run into limited up-travel, CV angle issues, and alignment specs that fight against you no matter how many times you re-shim. A quality aftermarket UCA restores proper geometry, opens up the up-travel range, and lets you actually use the lift you paid for.
Top Picks for the New Platform
Icon Delta Joint Pro is the strongest overall pick right now for the 2025-2026 4Runner and Tacoma-platform trucks. The Delta Joint design swaps the traditional ball joint for a spherical bearing setup that handles articulation and off-camber situations noticeably better than a stock-style ball joint, and it holds up well under repeated hard use. If you only cross-shop one option, start here.
Dirt King UCAs are a solid, proven alternative — heavier-duty construction and a reputation for durability in desert and high-speed off-road use, though they carry a higher price point and a firmer ride than the Icon setup.
Mazzulla arms are worth a look if you want a lighter-duty, budget-conscious option for a daily-driven truck that sees occasional trail use rather than dedicated off-road duty.
Pairing UCAs With the Right Suspension
UCAs alone won't get you where you want to go — they need to be paired with a shock and spring setup that matches your intended ride height and use case. A 2-3" front lift is the sweet spot for most 4Runner builds on 33s without cutting fenders, but confirm your shock's compressed length and your chosen UCA's droop specs work together before you order anything.
Installation Notes
- Budget for a full alignment immediately after install — new UCAs change your caster and camber specs completely.
- Torque specs matter more than usual on the Delta Joint design; follow the manufacturer spec exactly rather than a shop's general spec sheet.
- Inspect your factory sway bar end links while you're in there — a lift changes their working angle and they're a cheap, easy swap while everything else is apart.
Shop 2025-2026 4Runner Parts
Browse our full Suspension collection, or jump straight to parts fit for your model year: 2025 4Runner Parts & Accessories and 2026 4Runner Parts & Accessories.