SuperPro 2008 Pontiac G8 GT Rear Upper Control Arm Hyme Join SetThe VE and VF Holden Commodore known in the US as the Pontiac G8 and Chevrolet SS utilize a heim style joint where the rear upper control arm attaches to the rear hub knuckle. Known to have a finite service life SuperPro offers a replacement option where the factory offers only a complete knuckle with the new joints pre fitted. The ability to replace only the heim joints offers a massive savings and restores peak performance.