Revhigh has worked together with Vaitrix Australia to unleash a series of tuning upgrades to suit mild to wild peformance. From stage 1 to stage 2 and beyond. Revhigh's maps are the best dollar-per-horsepower modification one can make to the Holden engines. The upgrades dramatically increase horsepower and torque, making for an exceptionally quicker and more exciting vehicle. This is made possible through Revhigh’s optimization of the engine management system to take full adv