The stock wastegate actuator from Borg-Warner begins to leaks boost around 5-8psi. With this direct replacement you'll not have to worry about losing boost due to the weak designed actuator.
This wastegate actuator is built with a predetermined actuator spring suitable for at, or slightly above factory boost levels. If assembled with the yellow colored spring (from ES1832543), which is rated to a base pressure of 10-15 PSI, will increase the boost output of the application to a degree that will exceed the ability of the stock fuel system to maintain the necessary supply of fuel. Because of this, we must recommend that a high pressure fuel pump (HPFP) upgrade be installed, and the necessary fuel pump specific software also be utilized prior to the installation of this actuator.
This is not a complete bolt-on part, data logging and ECU adjustments are required. Although you can install at stock length and build boost sooner on a engine with a ECU upgrade.
This actuator is suitable for the OEM KKK KO4 Turbocharger as found in:
Audi S3, TT-S, Golf Edition 30 / Pirelli Edition, Golf R, Scirocco R and also the APR K04 kit (OEM turbo),AWE K04 kit (OEM turbo) and REVO upgrade (OEM Turbo).
This Part Fits the Following Vehicles