This adapter will allow you to mount your 6-bolt MOMO or other 6x70mm pattern steering wheel to the steering column in many Porsche models. The install is bolt-on without any welding using the 40-spline steering column on the car. The collapsable structure of the hub is designed to absorb an impact. Kit includes hub, hub cover, 6 countersunk screws for mounting wheel to hub, allen key, grounding plate and grounding wire. Fits the following Porsche, Audi & Volkswagen models: 2005-2011 Porsche 911 (997) 2005-2012 Porsche Boxster/Cayman (987) 1998+ Audi A4 1997-98 Audi A6 1997-03 Audi A8 1998+ Volkswagen Beetle 1999-02 Volkswagen Golf/Jetta On airbag-equipped cars, this will no longer operation of the airbag and should only be used for racing. 996 and Boxster required a washer for the nut to properly tighten (not included.)