KONI Special Active FSD Shock (Rear) for 2017-2021 Audi A4/S4 AWD 440i Gran Coupe F36 2019 BMW 3-Series (G20/G21)

2019 BMW 3-Series (G20/G21)

2010 Suzuki Swift Sport FWD (ZC31S)

2013 Toyota Prius (XW30)

AST Suspension designed the Competition 3-way adjustable series to fit the 1992-1995 Honda Civic Si 1

2014 Mazda Miata/MX-5 1

KONI Special Active FSD Shock (Rear) for 2017-2021 Audi A4/S4 AWD 440i Gran Coupe F36 2019 BMW 3-Series (G20/G21)KONI 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.