Ultima | Rear Shock Absorber HD Gas IRS | Holden Commodore Sedan VP VR VS VT VX VY VZ 1991–2006 | 400294HDUltima Rear Heavy Duty Gas Shock Absorber (Single) for Holden Commodore IRS Sedan VPVZ 19912006 This Ultima Rear Heavy Duty Shock Absorber (400294HD) is a robust, gas charged component specifically engineered for the Independent Rear Suspension (IRS) of the Holden Commodore Sedan models, spanning the VP, VR, VS, VT, VX, VY, and VZ series. This Heavy Duty shock is designed to enhance rear end stability, improve handling dynamics, and provide superior