The FOX Performance Series 2.5 Performance Elite DSC EVO kit 883-26-273 is a rear direct-replacement set for the INEOS Grenadier (2024 on), built around a 2.5-inch remote reservoir. The aluminum body is Type III anodized for corrosion and wear resistance. The adjuster is Dual Speed Compression EVO, which uses Variable Valve Control (VVC) on the high-speed circuit, so high-speed compression can be dialed in without disturbing small-bump response.
Compared with a cheaper bolt-on shock, the appeal here is the split damping. Owners get more comfort, independent high and low-speed circuits, and increased capacity for big hits, which suits a heavy, loaded Grenadier on washboard or rock-strewn trails. Installation fits the stock rear shock mounts, and the manufacturer states that the design needs no modification apart from reservoir placement. For a 2024+ Grenadier owner searching for a DSC EVO rear reservoir shock, 0-2 inch lift, or 883-26-273 upgrade, this is a factory-style fit with serious off-road adjustability.
The manufacturer's parts breakdown lists 883-26-273 as a rear kit that includes left and right rear shocks, with reservoir mounts and mounting hardware included.
The manufacturer's installation guide lists a 0-2 inch lift range for this application. Published lift figures vary across sources, so confirm your suspension setup with the manufacturer before ordering for a lifted vehicle.
Owners on user forums report that the rear top bolts can be reached behind the fender liner without removing it, though some installers trimmed liners to make clearance.
Owners on user forums report that each factory shock is held by two bolts, and that 15/16-inch or 24mm sockets handle them. Work on a clean, level surface with jack stands, and reuse the factory top mount. One owner completed the job on the ground with hand tools in about three hours. The manufacturer cautions against installing without the proper tools, expertise, and chassis lift, so plan for a lifted, supported vehicle and budget time for reservoir placement and any fender trimming.
