Ground Control Coilover Conversion Kit for 1993-2002 Pontiac Firebird RWD RX400h Bilstein B8 Performance Plus Dampers

Bilstein B8 Performance Plus Dampers to your 2017-2022 BMW 540i xDrive (G30) are a performance upgrade to OE Dampers designed to be paired with aftermarket lowering springs

2012 Mitsubishi Lancer FWD (CY4A)

2010 Audi S5 AWD (B8/B8

23 Kg/mm (685 lbs/in) Rear Spring Rates Progressive Quantity Full Set (Front & Rear) Vehicle Fitment

2025 Hyundai i30 (PD)

Ground Control Coilover Conversion Kit for 1993-2002 Pontiac Firebird RWD RX400h Bilstein B8 Performance Plus DampersGround Control Coilover Conversion Kits for the 1993 2002 Pontiac Firebird RWD bring true ride height control to your Firebird, letting you dial in exactly the stance and corner balance you want instead of living with one fixed factory height. Built around a threaded, spin to adjust spring perch system, this kit lowers the car and tightens up body roll for a flatter, more planted feel through corners all while working with the stock or aftermarket