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

Product features summary:

Wisefab Nissan S14 angle kit has redesigned knuckle to allow more suspension travel with the trending long stroke coilovers

1/8NPT outlet and return

Xtreme Outback upgrade kits are available with everything you need for a successful installation + accessories you may want to upgrade or replace while the gearbox is out of the vehicle

Clutch Kit - Xtreme Performance Heavy Duty Sprung Ceramic 450Nm 600kg (30% inc.) KNI22001-1B Xtreme Clutch Pro All the metal components onXtreme Performance sprung ceramic kit 1B Recommended for: Motorsport ApplicationsThese kits are available with sprung ceramic friction discs and are designed for motorsport applications where higher heat and torque capacity is required. These can also be used in some road applications. Specifications: Torque capacity 450Nm Clamp load 600kg 30% Increased over standard Sprung Ceramic Friction Disc Heavy Duty Pressure Plate Kit contains everything you