Best Lift Kits for the Toyota 4Runner
For a 5th-gen 4Runner, a spacer lift is cheap tire clearance and a full coilover is a suspension rebuild — KDSS trims and heavy rear loads decide which one you actually need.
A 4Runner lift kit is not one product. It is a choice between three different jobs: correcting the factory nose-down rake, buying an inch or two of tire clearance with a spacer, or replacing the front suspension outright with a coilover system built for the ride height you actually want. Which one is right for you depends less on how tall you want the truck to sit and more on your trim, your rear cargo load, and whether your 4Runner has KDSS.
This is written for the 5th-generation 4Runner (2010–2024), the version most owners are currently modifying and the one nearly every lift kit on the market is built around. For the rest of what we cover on the platform, start at the Toyota 4Runner hub. The short answer: a 2–3 inch spacer or leveling kit is the right call for most SR5 and TRD Off-Road trucks running up to 33-inch tires. A full coilover system earns its price when you’re carrying real weight over the rear axle — a third row, a drawer system, a loaded rooftop tent — or when you’re on a KDSS trim and need a kit engineered around that hardware rather than in spite of it.
4Runner lift kit types: leveling, spacer, and full coilover
Stock, the 5th-gen 4Runner sits slightly nose-down — usually somewhere around an inch of rake, front to rear, though this varies by trim and how much cargo lives in the back. A leveling kit just corrects that rake so the truck sits level. A spacer lift (a strut spacer up front, sometimes a coil spacer in back) adds real height on top of that, typically 1 to 3 inches, using the factory struts and springs. Neither changes spring rate or damping, and neither adds wheel travel — you’re raising the truck within the shock’s existing stroke, not giving it more room to move. We cover the terminology difference in more detail in lift kit vs. leveling kit, since the two get used interchangeably in listings and they are not the same purchase.
A full coilover system replaces the entire front strut assembly with adjustable coilovers valved and often lengthened for the target lift height, paired with new rear coil springs and shocks. Most serious kits also include new upper control arms, which matters more than it sounds like — stock UCAs run out of usable range once you lift past about 2.5 to 3 inches, and without new arms you lose camber adjustment and put more load on the ball joint at full droop. Spacer lifts run roughly $150 to $400 depending on brand. Full coilover systems with new shocks, springs, and control arms run from around $1,200 at the budget end to $3,000 or more for remote-reservoir shocks and adjustable-rate coils.
KDSS complicates things on Trail, Limited, and TRD Pro trims
KDSS — Kinetic Dynamic Suspension System — is standard on the Trail, Limited, and TRD Pro trims, and it’s not just a marketing badge. It’s a hydraulic system that links the front and rear sway bars through fluid-filled cylinders and lines. At low speed and heavy articulation, it lets the bars work semi-independently so a wheel can droop further off-road; at highway speed, it firms the bars back up for less body roll. The hardware — a cylinder mounted near the front sway bar, accumulator, and routed hoses — sits close to the parts a lift kit modifies.
The practical effect: a generic lift kit built for an SR5 or TRD Off-Road (no KDSS) won’t necessarily clear or account for that hardware on a KDSS truck, and lifting the suspension changes the geometry the hydraulic ram was designed around. If you own a Trail, Limited, or TRD Pro, confirm the kit is explicitly listed as KDSS-compatible before you buy — several major manufacturers sell two versions of the same lift, one with KDSS-specific brackets and one without. Buying the wrong one means finding out during install, not before.
CV angle and the diff drop most owners skip
The 4Runner’s front suspension is independent, which means each front wheel connects to the differential through a CV axle rather than a solid axle housing. Lift the front end and you steepen the angle of that axle from diff to hub. CV joints have a real operating range, and running one near the edge of it — especially combined with full steering lock — shows up as clicking, vibration at speed, or accelerated joint wear.
Most kit manufacturers put the practical ceiling for spacer-only lifts around 3 inches before they recommend a differential drop bracket, which lowers the front diff slightly to bring the CV angle back closer to stock. Full coilover kits at 3 inches and above typically bundle this bracket, or the new upper control arms, or both. If a kit at that height doesn’t mention either, that’s worth asking about before you order it — not after the first highway trip produces a vibration you can’t source.
Rear coil sag under third-row and cargo load
The rear suspension is coil-sprung, and the stock spring rate is set for an unloaded truck plus a reasonable amount of gear — not a full third row of passengers, a drawer system, water storage, and a loaded rooftop tent all at once. Add that weight and the rear end sags, sometimes visibly, within weeks. It’s not a defect; it’s a spring built for an average load carrying more than average weight.
This is the reason most reputable coilover kits offer more than one rear spring rate. Manufacturers typically bucket them by constant load carried — light (little to no regular cargo), medium (drawers, recovery gear, a couple hundred pounds routinely in back), and heavy (third row in regular use, a rooftop tent, or a loaded cargo box). Buying the base-rate spring because it’s the default option, then loading the truck for the medium or heavy bucket, is the single most common reason a fresh lift looks saggy within a season. A lift kit also does not raise your GVWR or payload rating — those numbers are fixed by the factory regardless of what suspension is underneath the truck, so overloading the rear axle stays your problem even after the spring upgrade.
Tire size gained per inch of lift
As a rule of thumb, each inch of lift buys roughly one more inch of usable tire diameter before you’re into fender trimming — and trimming buys a bit more on top of that. Wheel width and offset shift these numbers meaningfully, so treat the table below as a planning range, not a guarantee for your specific wheel and tire combination.
| Lift height | Typical max tire diameter | Trimming usually needed | Diff drop / new UCAs |
|---|---|---|---|
| Leveling only (corrects rake) | Up to 32 in | None to minor front mud flap trim | Not needed |
| Spacer lift, 2–3 in | Up to 33 in | Front inner fender liner | Recommended near 3 in |
| Full coilover, 3 in | Up to 33–34 in | Fender liner, sometimes pinch weld | Usually included in kit |
| Long-travel / 4–6 in system | Up to 35 in | Fender trimming or flares | Required |
Once you’re planning for 33s or larger, the drivetrain conversation is separate from the suspension one — bigger, heavier tires change your effective gearing and load the transmission and torque converter differently. If you’re headed that direction, read do I need to regear after bigger tires before you commit to a tire size, not after the lift is already installed. For picking the actual tire once you know your target diameter, see best tires for the 4Runner.
Which 4Runner lift kit to buy
If you drive an SR5 or TRD Off-Road, want a leveled stance, and top out around 32–33 inch tires, buy a spacer or leveling kit. It’s the cheapest path to the look and clearance most daily-driven 4Runners actually need, and it doesn’t touch your CV angle enough to require a diff drop.
If your truck is a Trail, Limited, or TRD Pro, buy a kit that explicitly lists KDSS compatibility before you look at anything else — height, price, or brand reputation. A kit that isn’t rated for KDSS can bind the hydraulic system or force you to disconnect it, which defeats the reason that trim exists.
If you regularly carry a third row, a drawer system, or a loaded rooftop tent, spend the extra money on a full coilover kit with a medium- or heavy-rate rear spring rather than the base rate. The base spring will sag under that load faster than the money you saved is worth.
If you’re going to 3 inches or beyond, budget for new upper control arms and a diff drop bracket as part of the job, not as an upsell — running that much lift without correcting CV angle and camber range is how a lift kit turns into a vibration complaint six months later. And check your torque specs again at 50 miles; new suspension hardware settles, and a lift is one of the few mods worth a second trip under the truck with a torque wrench.
Common questions
Does lifting a 4Runner void the factory warranty?
Not automatically, and not entirely — but a dealer can deny a specific warranty claim if they can show the lift caused it, which is a real distinction that matters in practice. We break down what Toyota can and can’t deny in does lifting a truck void your warranty.
Can I fit 33-inch tires on a stock 4Runner with no lift?
Rarely without rubbing at full lock or full compression, and it depends heavily on wheel offset and trim. A leveling kit or small spacer lift is the more reliable path to 33s without fender modification.
Does a lift kit hurt fuel economy?
Yes, though the tires matter more than the lift itself. Larger, heavier tires and the added aerodynamic drag from a taller stance typically cost 1 to 3 mpg on the highway. The lift bracket or spring swap alone has a negligible effect.
Is KDSS worth keeping, or should I just disconnect it?
Keep it if you actually wheel the truck — KDSS’s extra articulation is a real off-road advantage, not a marketing claim. If your 4Runner is a highway-only rig, some owners do disconnect it to simplify lift installs, but that gives up the handling benefit at speed too, since the system firms the sway bars on pavement as well.
How much lift can I run before I need a diff drop?
Most manufacturers put the line around 3 inches of front lift. Below that, stock CV angle and control arm range generally hold up. At or above it, a diff drop bracket and new upper control arms are standard parts of a properly engineered kit, not optional add-ons.