All the metal components on E90 rear suspension are from high strenght steel

Torque capacity 580Nm

Spring - Suits Turbosmart Plumb Back

Clamp load 700Kg Increased over standard

and Pink Springs Rated -24 to -14 InHg (installed)

Xtreme Clutch Conversion kit - HOLDEN RED MTR - TOY W58 21x29mm KGM23091-1B JR9 All the metal components onThe Stage 2 clutch uses an upgraded pressure plate combined with a ceramic friction disc in sprung configurations. The stage two clutch range is designed for road and track going vehicles that require a higher torque capacity and temperature tolerance, and faster engagement. Clutch engagement is more aggressive than stage 1, so it is not recommended for daily driven vehicles. These kits feature a high quality cover with increased clamping force