The Factory Race Series 3.0 Internal Bypass shock delivers race-dominating, position-sensitive damping technology and performance in a hassle-free bolt-on kit. Patented, position-sensitive internal bypass technology contains regulated ports that allow fluid to bypass the piston as it moves through the initial travel, and then forces fluid through the piston at the extreme ranges of compression and rebound. This allows for a plush, predictable ride over normal off-road driving conditions with the ability to ramp up damping force to counteract harsh bottom-outs or top-outs that could buck you off the trail. These hard-anodized, aluminum-bodied shocks are engineered with precision-machined aluminum components and race-bred internal valving. They are designed to bolt onto your aftermarket suspension lift kit using OEM shock pivots. Featuring a NEW heavy-duty piggyback bridge designed specifically for Jeep featuring hard-anodized, CNC-machined aluminum remote reservoir with external fins that act as a heat sink for increased heat dissipation. The Factory Race Series 3.0 Internal Bypass shocks utilize the same components we use in our race-winning Trophy Truck shocks, including stainless steel shock shafts, PTFE-lined spherical bearings, proprietary racing oil and high-temp Viton® seals. Specifications Body 3.0" impact extruded and CNC machined 6061-T6 hard-anodized aluminum body resists corrosion and weighs less than steel Body Plating This unit comes with a clear-coated, zinc-plated finish for outstanding durability on the trails. It also comes with JM92 advanced suspension fluid for outstanding variable temperature performance. Aluminum finned remote reservoir with piggyback bridge dissipates heat fast 3.0" Smooth Bore 6061-T6 billet aluminum