KONI Special Active FSD Shock (Front) for 2017-2021 Audi A4 AWD (Base, 53mm Clamp) Freelander Part Number 51643-2 Part Name

Part Number 51643-2 Part Name Sport Springs Country of Origin Germany Vehicle 2007-2009 Mazda 3 Mazdaspeed Chassis Code BK Spring Type Progressive Ride-Height Adjustable No Lowering - Front 1

2010 BMW X3 3

2014 Mitsubishi Lancer (CY/CZ)

1977 Lincoln Versailles (Fox)

2010 BMW 135i Convertible

KONI Special Active FSD Shock (Front) for 2017-2021 Audi A4 AWD (Base, 53mm Clamp) Freelander Part Number 51643-2 Part NameKONI Special Active shocks for the 2017 2021 Audi A4 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 out.