EVC THROTTLE CONTROLLER FOR HOLDEN LE5 LE9 Z24SED Z20S1 Z22D1 F18D4 A16LET 1.6L 1.8L 2.0L 2.2 2.4 I4Modern vehicles rely on 'fly by wire' throttle technology to measure pedal pressure & position to send signals to the engine's computer and convert it to acceleration. Many of these systems have a noticeable delay. EVC throttle controllers by iDrive (rebranded as Ultimate9) reduce this lag and improve response to make the acceleration feel more responsive. Key Features: Eliminates throttle lag. Increases throttle response. Improves overall