Toyota 4Runner Lift & Leveling Hub

The 4Runner is two platforms wearing one badge: the fifth generation that ran for fifteen model years (2010–2024), and the all-new sixth generation (2025+) rebuilt on Toyota’s TNGA-F truck platform, shared with the Tacoma, Land Cruiser, Tundra and Sequoia, per Toyota’s own generation history. Between them they cover a huge share of the SUV lift market — and a disproportionate share of its fitment mistakes, because the 4Runner hides two factory suspension systems that decide whether a kit fits long before lift height enters the conversation.

This hub is where the platform’s generations, factory-lift trims and exclusions live, stated only where we have verified them against manufacturer sources. The 4Runner money pages — the kit-by-kit buying guides — come in a later wave; this page is the groundwork they will stand on.

Check first: KDSS and X-REAS decide which kits fit

KDSS (Kinetic Dynamic Suspension System) is Toyota’s hydraulically linked sway-bar system: it firms the bars up on-road and lets them release off-road for articulation. On the fifth generation it was an option on the Trail grade (2010–2016) and on the TRD Off-Road and TRD Off-Road Premium (2017–2024) — Toyota’s own 2024 model comparison lists it for exactly those trims. One warning, because the internet gets this wrong: Toyota does not list KDSS for the fifth-generation TRD Pro. If a listing sells you a KDSS-specific Pro product, ask it for its source.

KDSS changes the kit answer in both directions. Some manufacturers exclude the trucks outright — Rough Country’s 4Runner lift states “Does NOT fit KDSS-equipped models,” and Skyjacker prints the same exclusion; Bilstein’s B8 6112 application for this platform is catalogued “Without KDSS” only. Other systems are engineered around it: ICON’s 4Runner systems are documented as KDSS-compatible, but with conditions — a KDSS-specific rear track bar is required and the front sway-bar relocation brackets are not used. “Fits 4Runner” without a KDSS line is an incomplete fitment claim.

X-REAS is the second trap. It is a cross-linked damper system — the shocks are hydraulically linked diagonally through a center control absorber, per Toyota’s description — fitted to the Limited in every fifth-generation year, the Limited-based Nightshade, and the TRD Sport (2022–2024). Because the four dampers work as one linked system, a conventional shock or coilover lift cannot keep it: the honest options are an X-REAS-specific spacer kit that retains the factory shocks (Rough Country sells one, kit 767, for exactly these trucks) or a full X-REAS delete/conversion, replacing the system outright. Any listing that shows a standard shock kit as fitting an X-REAS truck without mentioning the system is a listing to walk away from.

2010–2024: the fifth generation

Fifteen model years on one architecture makes this the deepest used market in the SUV lift world — and the generation where the two systems above do their damage, because a 2014 Limited (X-REAS), a 2019 TRD Off-Road Premium with the KDSS option, and a 2021 SR5 are three different fitment problems wearing the same body. Standard tire fitment is P265/70R17 on the 17-inch trims; Limited and TRD Sport run P245/60R20 on 20s.

The factory-lift trim is the TRD Pro. From 2019, per Toyota, the Pro pairs 2.5-inch Fox internal-bypass shocks with TRD-tuned front springs for an additional 1 inch of front lift — front only; there is no rear lift in Toyota’s description, and Toyota repeated the same figure for the final 2024 model. Kit manufacturers treat the Pro accordingly: Rough Country’s 4Runner lift excludes TRD Pro models alongside KDSS and X-REAS, because stacking a spacer system on a factory-tuned, factory-lifted suspension is not a fitment.

2025+: the sixth generation

The sixth generation moves the 4Runner onto the TNGA-F platform it now shares with the Tacoma — same bones, different body — and reshuffles the exclusion deck rather than clearing it. KDSS is gone; in its place, the Stabilizer Disconnect Mechanism (SDM) is standard on TRD Pro and Trailhunter, per Toyota’s 2026 release.

The Trailhunter is the factory-lift headline: Toyota states its Old Man Emu 2.5-inch forged shocks and 33-inch Toyo tires together raise it 2 inches at the front and 1.5 inches at the rear. The TRD Pro runs TRD-tuned Fox QS3 adjustable internal-bypass shocks and the same 33-inch tires — note that Toyota publishes no lift figure in inches for the sixth-generation Pro, so neither do we. Limited and Platinum trucks add Adaptive Variable Suspension (AVS) to the exclusion list. The aftermarket has already responded exactly as the exclusions predict: ReadyLIFT’s 2.5-inch SST for the 2025+ 4Runner (69-55250) states plainly “Not compatible with TRD Pro or Trailhunter models,” and Rough Country’s 2025+ kits carry the same Pro/Trailhunter exclusions plus AVS.

Where to go next

The buying-guide wave for this platform comes later; until then, the transferable homework is the same as for any platform on this site. Decide the lift type first with leveling kit vs lift kit vs body lift, understand what diameter you are actually chasing with the tire size and lift height guide and the tire size calculator, and price the whole job — kit, labour, alignment, tires — with how much does it cost to lift a truck. Tacoma owners will find the shared-platform story continued on the Tacoma hub.

Sources for this hub (checked 2026-11-03): Toyota USA Newsroom releases on the fifth and sixth generations, the 2019 TRD Pro suspension, the 2025 launch and the 2026 range; Toyota’s 2024 4Runner comparison for KDSS/X-REAS trim fitment; Rough Country, Skyjacker, Bilstein and ICON fitment documentation for the KDSS/X-REAS kit exclusions; ReadyLIFT’s 2025+ 4Runner SST page for the sixth-generation exclusions.