Dobinsons 2.6" IMS Monotube Shock (KZJ78/LJ78 Front)

SPEEDHOUSE TAKE: These are the real deal. This is the best riding off-the-shelf suspension for KZJ78 trucks, excellent control over high speed offroad terrain and wonderful ride characteristics on the road. Our most popular suspension offering to in-house service customers and everyone has been supremely happy with the results. The ability for these shocks to control body roll and bottom out resistance is immediately apparent when you take these out of the package, the absolutely massive 2.6" piston results in a nearly 3" diameter shock body making whatever is coming off your truck look downright puny.

From Dobinsons:

Dobinsons IMS (Internal Monotube Shock) Suspension Lift Kits are designed for drivers seeking enhanced ride control, heat dissipation, and off-road performance over standard twin-tube systems. Built with 2.6″ monotube shocks and performance-tuned valving, these kits are perfect for daily drivers who need reliability with added trail capability.

IMS Monotube Shocks:

-Large 2.6″ (66mm) body for increased oil capacity and cavitation resistance.

-Monotube design with high-pressure nitrogen gas for responsive damping.

-Precision valving tuned specifically for each vehicle platform.

-Hardened chrome 18/22mm piston rod and high-quality seals for durability in extreme conditions.

-Features NOK long-life seals to withstand harsh environments

-Uses custom-blended FUCHS oil for superior thermal stability and performance

Coil Springs & Leaf Springs:

-Vehicle-specific springs available in multiple load ratings to suit different setups—daily driving, towing, or full overlanding builds.

-Manufactured from high-quality spring steel, shot-peened and scragged to prevent sagging.

Includes all necessary hardware for a complete bolt-on installation.

Matched components ensure correct alignment and geometry for safe handling.

Why Choose IMS Shocks:

The IMS Series represents a step up in performance, control, and heat resistance. With a large 2.6″ monotube body and high-pressure nitrogen design, IMS shocks deliver better fade resistance and more responsive damping—perfect for drivers who demand more from their suspension. Whether you’re tackling rough forest roads, carrying camping gear, or building a mild overland setup, IMS offers noticeable improvements over twin-tube systems. They’re great for people who hit the trails more often and want better on-road handling without going full race-spec.