Rancho Suspension Shock Absorber P/N:RS55188

Smooth out rough pavement and off-road impacts with the Rancho RS5000X shock absorber, MPN RS55188. This front damper installs as a direct-fit replacement for the listed 1986-1994 Nissan D21, 1998-2004 Nissan Frontier, and 2000-2004 Nissan Xterra — see the Buyer's Guide tab for engine-level details.

• Cross Tuned technology: Rancho's exclusive rebound valving system paired with an advanced compression phase, designed to improve overall handling and performance both on and off road.
• Progressive Engagement Valving: custom-tuned for each vehicle to help reduce initial impacts at low speeds and minimize a rough ride, with a Compression Control Valve that regulates fluid transfer to absorb impacts without disc flutter.
• Strong, durable build: 16 mm nitro-carburized piston rod that resists scuffs and corrosion, double-welded loops at stress areas, a 35 mm sintered iron piston, and a polyvinyl protective boot.
• All-weather twin-tube design: large twin-tube body filled with all-weather fluid for cooler operation, nitrogen gas pressurized to 150 PSI to reduce foaming and damping fade, plus a polyurethane rebound bumper and rubber bushings to absorb ride harshness.

Backed by Rancho's Limited Lifetime Warranty. Sold individually; for even, balanced ride quality, replace both front shocks as a matched pair. Interchange: RS5188 · 23197D