Budget Lift Kit — Bilstein 5100 and Spacers (≤$600)

The Bilstein B8 5100 set is the correct budget lift for non-KDSS 4Runners — a direct replacement of the factory shocks that delivers 1.5"–2" of lift and meaningfully better damping without touching the suspension geometry.

The 5th gen 4Runner (2010–2024) comes in two suspension configurations: non-KDSS (SR5, Limited, and base trims) and KDSS-equipped (Trail Edition, TRD Pro, and some Limited packages). KDSS stands for Kinetic Dynamic Suspension System — a hydraulic sway bar linkage that passively adjusts front-to-rear roll resistance for trail articulation. Standard coilovers and spacer lifts are not compatible with KDSS because the KDSS system requires specific shock valving to function correctly. Before ordering any budget lift, confirm whether your 4Runner has KDSS by looking under the front and rear for hydraulic cylinders connecting the sway bar end links to the axle. Non-KDSS 4Runners have a conventional mechanical sway bar.

For non-KDSS 4Runners, the Bilstein B8 5100 is the cleanest budget approach. The 5100 is a monotube shock with a height adjustment collar on the front units — set to roughly 1.75" of lift front and use the preload-adjusted rear to match. You get improved damping, the lift, and no geometry compromise at this height. The Icon Stage 1 spacer lift is an alternative that uses a urethane spacer above the OEM spring — it lifts by 1.5"–2" but keeps the factory shock, which is fine if the factory dampers still have life. The Rough Country kit is the lowest-cost option but uses lower-quality dampers and is not recommended for builds that will see regular trail use.

At 2" of lift on a non-KDSS 4Runner, the factory UCAs are operating at their outer geometry limit but don't yet require replacement. Caster changes are manageable. For anything above 2", UCAs become necessary on the 4Runner as on the Tacoma.

Why it works

• Clean direct-replacement install with no geometry changes required at 2" lift
• Bilstein 5100 is a proven monotube design — significantly better than OEM damping for trail and washboard
• Front height adjustment collar allows fine-tuning for precise level stance
• No KDSS system involvement on non-KDSS models — straightforward swap
• Fits 285/75R16 (33") tires with minor fender trimming at 2" lift

Trade-offs

• Non-KDSS only — standard shocks will compress the KDSS system incorrectly on KDSS-equipped models
• Does not address CV angle or caster above 2" — UCAs required for 2.5"+
• Rough Country kit uses lower-quality shocks — acceptable for mild use, not recommended for regular trail driving
• Spacer lifts (Icon Stage 1) retain factory damper — if factory shocks are worn, you're adding lift without improving damping
• Get an alignment — it's not optional after a lift, even at this height

Tools required

• floor jack
• jack stands
• socket set
• torque wrench
• spring compressor
• breaker bar

Parts

Part	Vendor	Est. price
Bilstein B8 5100 Front and Rear Set (5th Gen 4Runner 2010-2024)	Bilstein	~$549
Icon Vehicle Dynamics Stage 1 Lift System (spacer, 5th Gen 4Runner)	Icon Vehicle Dynamics	~$399
Rough Country 2" Lift Kit (5th Gen 4Runner, non-KDSS)	Rough Country	~$299

Sources

• {'title': 'Bilstein 5100 Product Specifications', 'url': 'https://www.bilstein.com/us/en/'}
• {'title': '4Runner World Lift Kit Discussion', 'url': 'https://www.4runner.org'}

Related

• Mid-Tier Lift with UCAs — 2.5"–3" Lift ($1,000–$2,500)
• Expedition Lift — Long-Travel and Dual Remote Reservoir ($2,500+)
• All Toyota 4Runner guides & tools
• Browse the full DIY database

---

Written and maintained by an AZ wheeler and driveway wrencher. Always cross-reference your factory service manual — modifications affect vehicle safety and warranty. Work at your own risk.