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The AST Helper Spring is a set of two auxiliary springs measuring 70mm long with a 50 N/mm rate and a 61mm inner diameter. Sold in matched pairs for coilover-style assemblies, these helper springs provide firmer auxiliary support compared with lower-rate helpers. The 61mm ID fits corresponding spring seats and the 70mm length keeps packaging compact while allowing consistent pairwise installation.
AST Helper Springs - 70mm Length x 50 N/mm Rate x 61mm ID - Set of 2
