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The H&R Sport Spring kit for 2005–2008 Acura RL with SH-AWD (VIN code KB1) lowers ride height to reduce fender well gap and lower the center of gravity for steadier handling. The progressive spring rate reduces body roll while preserving comfort and can modestly improve aerodynamics. Built from 54SiCr6 spring steel and finished with shot peening and block-setting, these lightweight, resilient springs are produced in Germany and are a popular single-part upgrade.
H&R 05-08 Acura RL SH-AWD (VIN code KB1) Sport Spring
