General Information: Validity

These guidelines for assessing the wheel suspension are only relevant for vehicles with forged control arms .

Die-cast and forged control arms can be differentiated based on the following illustrations:

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Lower trailing arm (part identifier 4017)

1	Die-cast lower trailing arm
2	Forged lower trailing arm

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Control arm (part identifier 4018)

1	Die-cast control arm
2	Forged control arm