KONI Special Active FSD Shock (Rear) for 2017-2021 Audi A4 AWD (Base) Express 3500 this kit replaces your Mazda

this kit replaces your Mazda Protege's stock suspension with a fully adjustable coilover system you can tune by feel

1990 BMW 325e (E30)

2005 Mercedes-Benz E63 AMG Airmatic DC (W211)

Part Number 50005 Part Name Sway Bars & End Links UPC 00611512500058 Vehicle 1977-1983 BMW 3 Series 320i Chassis Code E21 Drivetrain RWD Bar Diameter - Front 1 in

Rear Coilover Conversion Vehicle Fitment

KONI Special Active FSD Shock (Rear) for 2017-2021 Audi A4 AWD (Base) Express 3500 this kit replaces your MazdaKONI 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.