KONI Special Active FSD Shock (Rear) for 2002-2008 Audi A4 FWD/AWD CLA 45 AMG Yellow Speed Racing Pro Plus

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KONI Special Active FSD Shock (Rear) for 2002-2008 Audi A4 FWD/AWD CLA 45 AMG Yellow Speed Racing Pro PlusKONI Special Active shocks for the 2002 2008 Audi A4 FWD AWD use KONI's patented Frequency Selective Damping (FSD) technology to deliver two damping curves in one fixed shock soft for low frequency road inputs (comfort) and firm for high frequency body motion (control). The result is a daily driver that feels composed without compromising ride quality. FSD reacts to the road, not to a driver setting, so there's nothing to adjust and nothing to wear