BMW 3 Series AWD (E90/E91/E92) 2006-2011 - 500 Series Super Low Spec Coilovers Spring Upgrade:Swift Springs Standard - Hyperco Springs may be used if necessary Concave Flow Digressive Piston Technology™

Concave Flow Digressive Piston Technology™

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A conventional shock absorber can withstand a 2kg spring rate difference before requiring a revalve

The Concave Flow Digressive Piston allows for a Jekyll and Hyde personality

Dreadnought PRO damper systems are the ultimate in performance and adjustability

BMW 3 Series AWD (E90/E91/E92) 2006-2011 - 500 Series Super Low Spec Coilovers Spring Upgrade:Swift Springs Standard - Hyperco Springs may be used if necessary Concave Flow Digressive Piston Technology™CUSTOM. MODULAR. REBUILDABLE. Fortune Auto engineers have developed specialized valving profiles and optimized specifications for the Super Low Spec. The Super Low Spec 500 Series coilovers are designed to dramatically lower vehicle ride height. Average height adjustability is roughly 2. 5" to 5" lower than OEM ride height (depending on application). Swift Springs Standard, Hyperco Springs substitute if necessary FA Synthetic Shock Oil Flow Digressive