SUSPENSION DESCRIPTION AND OPERATION 60-5 The air spring is fitted on the upper part of the strut. Within the strut module the air spring elements comprise atop plate assembly, an airbag and abase piston. The airbag is attached to the top plate and the piston with a crimped ring. The airbag is made from a flexible rubber material which allows the bag to expand with air pressure and deform under load. On the side of the top cap is a connector which allows for the attachment of the air hose from the cross- link valve. The piston is made from plastic and is shaped to allow the airbag to rollover its outer diameter. Subframe The subframe is fabricated from steel tubing to provide a robust platform for the mounting of the suspension and engine. The subframe is attached to the vehicle body via six mountings. The subframe fabrication provides accurate location for the suspension components and the steering rack. Additional brackets allow for the attachment of the height sensors and the engine mountings. The anti-roll bar is attached across the rear of the subframe and is mounted inflexible bushes which are secured with 'D' shaped clamp plates.