which allows to change suspension stiffness and handling very quickly without changing the spring and messing up ride heights

This product was originally designed with rally in mind

Rideheight 378 mm

97in) Butterfly Style Zero-Offset Valve

BMW E90 / E92 / E92 M3 / E81 / E82 rear subframe mod kit will allow you to adjust rear grip level by changing the position of the #7 arm

JRWA3 Adapters 15mm 5x114 56,1 56,1 Black Tuner Bolts which allows to change suspensionPrice per pair; Type: JRWA3; PCD: 5x114,3; CB: 56,1; Center Lip: 56,1; Thickness: 15mm; Diameter: 149mm; Studs Nuts Pressed: 12x1,25 Studs (Outstanding Lenght 27,5mm); Mounting Bolts Nuts: 12x1,25 Nuts;