This actuator is designed for the Audi A4 and Volkswagon Passat 1.8T engines that are longitudinally mounted. ( crankshaft of the engine runs inline or the length of the chassis). This product is built with a predetermined actuator spring suitable for at, or slightly above factory boost levels. The actuator can be assembled with a stiffer spring upon request. It is designed and built with the intention of increasing the boost output of a turbocharged system. We cannot guarantee the ability to increase the boost output beyond a level that is within the parameters set by the engine-management-system of the given vehicle at the time of installation, whether that system is factory or aftermarket.
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