{"product_id":"rancho-rs55397-suspension-shock-absorber-rear","title":"Rancho RS55397 Suspension Shock Absorber - Rear","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003eRancho RS5000X shock absorber RS55397 is built for rear suspension applications that need controlled damping and consistent response on paved roads and rough terrain. It uses Rancho’s RS5000X valving approach with advanced compression control to improve handling and ride stability.\u003c\/p\u003e\u003cp\u003eCompatible with Toyota 4Runner and Toyota FJ Cruiser rear applications listed below, this shock is a fitment-specific replacement for vehicles with the required suspension notes. Part number RS55397 is also referenced by interchange listings for related applications.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRS5000X valving for improved on- and off-road handling.\u003c\/li\u003e\n\u003cli\u003eAdvanced compression control for more consistent suspension response.\u003c\/li\u003e\n\u003cli\u003eDust shield included to help protect the shock body.\u003c\/li\u003e\n\u003cli\u003eRubber dust shield material for added protection in service.\u003c\/li\u003e\n\u003cli\u003eStem upper mount and loop bushing lower mount for application-specific installation.\u003c\/li\u003e\n\u003cli\u003eExtended bumper stop included; compressed bumper stop not included.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThe Rancho RS5000X line is engineered as a performance-oriented shock absorber family for drivers who want firmer control without moving away from a direct replacement format. RS55397 uses a stem upper mount and a loop bushing and sleeve lower mount, along with an 8.07-inch travel length, 22.11-inch extended length, and 14.04-inch compressed length. The reserve tube diameter measures 2.252 inches, and the shock includes a dust shield for added protection.\u003c\/p\u003e\u003cp\u003eThis part fits 2021-2024 Toyota 4Runner, rear; 2010-2020 Toyota 4Runner, rear; 2007-2014 Toyota FJ Cruiser, rear; and 2003-2009 Toyota 4Runner, rear, with the listed suspension notes. For Toyota 4Runner and Toyota FJ Cruiser owners replacing a rear shock absorber, RS55397 provides a fitment-specific option built around Rancho RS5000X tuning.\u003c\/p\u003e\u003cp\u003eThis part cross-references KYB (e.g., 344410, 349185) for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eExcessive rear suspension bounce after bumps or dips.\u003c\/li\u003e\n\u003cli\u003eLoose or unsettled ride feel on uneven pavement.\u003c\/li\u003e\n\u003cli\u003eReduced control during off-road or mixed-surface driving.\u003c\/li\u003e\n\u003cli\u003eWorn shock performance that affects handling and stability.\u003c\/li\u003e\n\u003cli\u003eNeed for a rear shock matched to specific Toyota 4Runner and Toyota FJ Cruiser fitment notes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes\u003c\/h2\u003e\u003cp\u003eVerify the vehicle’s rear suspension configuration before ordering. This shock is listed for 4Runner applications without Delphi REAS or Kinetic Dynamic Suspension in the specified years, and for FJ Cruiser applications with rear raised height from 0 to 1.5 inches. Confirm mount style and length specifications against the original part before installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eRancho RS5000X shocks are part of a performance-focused product line known for application-specific valving and suspension control. RS55397 follows that RS5000X design approach for rear shock replacement in the listed Toyota applications.\u003c\/p\u003e","brand":"Rancho","offers":[{"title":"Default Title","offer_id":53503733661877,"sku":"BCKM-RS55397","price":85.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/TS_RS55397_Fro.jpg?v=1791615784","url":"https:\/\/www.partcatalog.com\/products\/rancho-rs55397-suspension-shock-absorber-rear","provider":"PartCatalog","version":"1.0","type":"link"}