Swift Spec-R Springs - E90 M3 | E92 M3Swift Spec R Springs deliver track focused performance engineered for the serious enthusiast. Dropping your E90 M3 sedan or E92 M3 coupe 1. 0" front and 0. 7" rear, these race tuned springs feature aggressive 5. 0 kg front and 12. 0 kg rear rates optimized for factory dampers. Tested extensively on circuit, they maximize shock valving potential while remaining street capable for daily duty. The complete four spring set balances precision handling with
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