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Bilstein B8 8112 (ZoneControl CR) is a direct-fit, 2.65" coilover designed for light trucks and SUVs. Featuring position-sensitive damping with a triple-piston system, it offers 3-stage compression and 2-stage rebound control. Includes a remote reservoir with anodized bolt-on chassis mount for added cooling and performance.
Includes:
- (2) Bilstein 8112 Shock & Spring Assemblies
- (2) Bilstein 8100 Rear Shocks
Front Coilover Options:
- Bilstein 8112 (ZoneControl CR) [41-326022 / 41-326039]
- Bilstein 8112 (ZoneControl CR DSA+) [41-326084 / 41-326091]
Rear Shock Options:
- Bilstein 8100 [25-294118 / 25-325805]
- Bilstein 8100 DSA [25-294125 / 25-328929]
- Bilstein 8100 with External Bypass [25-326048 / 25-326055]
Rear Lift Options:
(Includes all necessary hardware for installation)
- Icon Add-A-Leaf [51200]: 1.5 inch lift
- OME Rear Leaf Spring [CS055R]: 2.5 inch lift (Recommended for additional rear load)
DSA (Dual Speed Adjusters):
DSA allows you to independently tune high-speed and low-speed compression damping. This gives you greater control over how your suspension responds to small bumps (like chatter or washboards) versus big hits (like whoops or drops), letting you dial in the perfect balance for both daily driving and aggressive off-road use.
External Bypass Shocks:
External bypass shocks use external tubes and valves to allow oil to "bypass" the piston at certain points in the shock stroke. This creates tunable zones of damping—soft in some sections and stiff in others—ideal for high-performance off-road driving. External bypass systems provide unmatched control over shock behavior during different stages of compression and rebound.
Notes: Provides 2.25-3.25" front lift. Image shown for illustrative purposes only. Actual products or components may vary based on selected options.
Frequently Asked Questions
Assembled: Includes the shock, coil spring, and top mount preloaded and ready to install. No spring compressor required—just bolt it in and go.
Unassembled: You’ll receive the components separately. You’ll need to reuse your factory top hats and compress the spring during installation.
Choosing an assembled option saves time and eliminates the need for special tools. It's ideal if you want a quicker, hassle-free install.
If your vehicle has extra weight from accessories like aftermarket bumpers, winches, roof racks, rock sliders, or drawer systems, it’s important to choose springs designed for that load. Standard lift springs are intended for stock weight—using them under added load can result in sagging, poor ride quality, or insufficient lift height.
Our product descriptions include guidance to help you select the correct spring based on your setup. If you're unsure, feel free to contact us and we'll point you in the right direction.
Upper control arms connect your front suspension to the frame and play a critical role in alignment. When lifting your vehicle, stock UCAs can limit suspension travel and make proper alignment difficult. Aftermarket UCAs—like those offered by SRQ—provide improved geometry, more caster, and additional clearance for larger shocks and tires.
A differential drop kit helps correct CV axle angles after lifting an independent front suspension (IFS) vehicle. When your front end is raised, the axles sit at a steeper angle, increasing wear and the chance of tearing a CV boot. A diff drop lowers the front differential slightly to reduce that angle and prolong component life. It’s a small but worthwhile upgrade on most 2–3" lifts.
A Panhard Correction Kit repositions the panhard bar to correct rear axle alignment after lifting a solid axle vehicle. Without it, the axle may shift slightly to one side, affecting handling and tire clearance. The PCK restores proper geometry to keep your axle centered and tracking true. SRQ Fabrications offers the original PCK for the 4Runner, designed for bolt-on precision and trail-tested durability.
DuroBumps are premium progressive bump stops that replace the factory rubber stops. They help cushion suspension compression, prevent harsh bottom-outs, and protect your shocks and frame from damage. Unlike stock bump stops, DuroBumps provide a smoother transition under load—especially beneficial when off-roading or running extended-travel shocks.
Extended brake lines are longer than factory brake lines and are designed to accommodate increased suspension travel. If you're lifting your vehicle—especially 2" or more—it’s important to ensure your brake lines aren’t stretched at full droop. Extended lines provide the necessary slack and help prevent failure during articulation or hard off-road use.
Trim packers are small coil spring spacers used to correct a lean or add minor lift. They’re often installed on the driver’s side to offset “driver side lean” (due to fuel tank, battery, etc.) or stacked to fine-tune ride height. A simple but effective way to level your suspension without replacing springs.