What power gains could be expected if I installed a cold air intake, High ratio roller rockers (1:9:1), plenum spacer 12mm, 25mm cold air intake manifold insulator, 69mm bored out throttle body and a recalibrated PCM to suit these upgrades on my VY v6 eco

With these modifications we would expect to see a gain of about 20-25kw gain peak power, however that's only half the story, you'll also notice great improvements in throttle response and low-mid rpm torque. This equates to a vehicle that is much nicer to drive as it will be a lot punchier of the line and in traffic which is ideal for a daily driven vehicle.