ITEM: ULTIMATE9 EVC THROTTLE CONTROLLER FOR OPEL VAUXHALL ASTRA (J) 2009 – 2015 EVCSOSL-ORANGE. How does a throttle controller work? By sharpening your vehicles throttle response and introducing a more aggressive throttle curve you can greatly reduce and often completely eliminate throttle lag, improve overall vehicle drivability and make a noticeable improvement to the vehicles […]