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 3.5-4.5″ aftermarket suspension lift kit using OEM shock pivots. Featuring a NEW heavy-duty piggyback bridge designed specifically for Wrangler JL 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. Body 3.0″ impact extruded and CNC machined 6061-T6 hard-anodized aluminum body resists corrosion and weighs less than steel Body Plating Hard-anodized for a durable finish Reservoir NEW! Aluminum finned remote reservoir with piggyback bridge dissipates heat fast Components Black-anodized, CNC-machined 6061-T6 billet aluminum Shaft 7/8″ hard chrome plated heat-treated alloy steel Piston Race-developed high-flow piston design Valving Application-specific valving to maximize performance Seals Redundant sealing pack system main seal, wiper seal, and scraper seal resist leaks in harsh conditions Bearing PTFE-lined, heat-treated, alloy steel spherical keep the shock movement quiet and smooth Adjustments Dual Speed Compression (DSC) adjusters allow tool-free high and low-speed compression adjustment Adjuster Type DSC – Dual Speed Compression Extended 29.780 Compressed 18.930 Travel 10.850 Top Mount Eyelet Bottom Mount Eyelet