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The Bilstein 24-185387 is a B6 4600-series front monotube shock absorber for Toyota Sequoia and Tundra models with a standard chassis and no electronic suspension control (ESC). It's a direct-fit replacement designed to hold up under repeated towing without the fade you get from worn factory shocks.
Confirm your truck has the standard chassis (not the ESC-equipped variant) before ordering, since this shock is not a fit for electronically controlled suspensions.