These OEM GT3 Swaybars are manufactured by Porsche to their original specifications ensuring you get the same quality and performance offered by their flagship supercar. The 997.1 bar is a 3 position adjustable piece in a thickness of 24mm. The 997.2 bar is also 3 way adjustable and is manufactured in a thickness of 25.6mm. To use the 997.2 GT3 swaybar on a 997.2 Carrera you need the adaptor, also shown below. (Part #S-111-RSBADP997.2).