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Bilstein B1 (iRC) Active Suspension Control Module for 2007-2021 Volkswagen GTI 1970 1992 Subaru Impreza WRX STIBilstein B1 (iRC) Active Suspension Control Module for the 2007 2021 Volkswagen GTI converts Bilstein B16 (ridecontrol) Suspension Kit to a smart phone adjustable suspension system. This module works together with a smartphone app to allow the user to fine tune the parameters which controls the switching from Comfort to Sport on the electronic Dampers. An accelerometer built into the module provides the app with a graph of the g forces while driving.