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The AST Helper Spring is a set of two auxiliary springs measuring 70mm long with a 40 N/mm rate and a 75mm inner diameter. Supplied as a pair, these helper springs are intended for coilover assemblies that require a larger internal diameter. The 70mm length and moderate 40 N/mm rate deliver consistent auxiliary support, making them suitable for fine-tuning suspension response alongside primary springs.
AST Helper Springs - 70mm Length x 40 N/mm Rate x 75mm ID - Set of 2
