The PSR Holden Commodore VN-VP-VQ IRS Stage 3 Handling Kit is our premium package for the enthusiast who demands total control over their vehicle's handling balance and chassis setup. Taking the comprehensive front-end upgrades of our Stage 2 kit, we turn our attention to dialing in the ultimate roll stiffness synergy, maximizing chassis predictability, and locking down the drivetrain.

To balance out the 27mm front sway bar, we introduce a 20mm Heavy Duty Rear Sway Bar. This precise sizing allows you to finely tune the classic Commodore chassis, providing immense front-end bite on corner entry while allowing the rear to rotate smoothly on corner exit.

To ensure absolutely zero wasted energy in the driveline, this tier finalizes the rear end by adding a Rear Differential Mount Bushing Kit. By eliminating differential wind-up and pairing it with the solid IRS cradle bushes, you gain immediate, violent throttle response, ensuring every ounce of torque is sent directly to the rear wheels without hesitation.