Tech Articles

Bilstein 8112 ZC tech explained + How to use the external Adjusters

The Bilstein 8112 Zone Control coilovers represent a groundbreaking evolution in off-road suspension, offering a level of performance that effectively replaces traditional coilover, bypass, and bump stop systems in one compact unit. Using a proprietary three-piston design, these shocks provide five distinct damping zones (three for compression and two for rebound) each tuned to deliver unmatched control across all conditions. Bilstein's Jounce Cut-Off (JCO) and Rebound Cut-Off (RCO) systems ensure smooth transitions through extreme suspension events, while the high-flow digressive piston with directional bleed enables fully customizable compression and rebound curves. Unlike bypass shocks that divert oil flow, the 8112’s internal zones work with the main piston for consistent feel and superior performance. With dual-speed compression adjusters and a JCO adjuster offering meaningful fine-tuning, this shock allows precise setup for both daily driving and aggressive off-road use. Built for serious performance, it demands supporting structural upgrades and expert tuning, which our shop uniquely provides through extensive hands-on experience, in-house rebuilds, and custom valving tailored to each vehicle’s needs.

Bilstein 8125 vs 9200 Coilovers
Bilstein 9200 series shocks are designed with racing in mind, but they are a good fit for most customers over the 8125 series shocks. In this article i will go over a few of the differences between the 2 models...
What are the different kinds of shocks?
Learn about all of the different types of shocks from smooth bodies to bypasses, reservoir styles and bumps.
Are shocks for a 4th gen 4Runner an upgrade for my 3rd gen?
No ❤. Lately I've gotten a few e-mails from folks asking if using shocks valved for a different vehicle will be an upgrade VS shocks valved to their vehicle. I'm honestly never really sure how to respond to these questions....
Internal Bypass Coilovers Compared
Are you confused by the different kinds of IBP coilovers and not sure which to choose?Here's a guide to the Pros and Cons of each 2.5" internal bypass coilover setup: 1. The Why and How of IBP's 2. ARB BP-51...

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