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Bilstein's B6 line is a bolt-in upgrade over worn factory shocks, using a monotube gas-pressure design tuned for the original equipment spring rate — no spring swap needed. This 24-186438 unit is application-tuned for the rear position on Safari Cheeta and Zanzabar trailers.
Confirm rear-axle fitment for your specific trailer before ordering, as shock application varies by model and configuration.