Feder TiAL klein rot Wastegate & BOV Zubehör extern TiAL Wastegate Spring small red Original TiAL spring for F38, F40, F41, F46P, V44, V50, V60 For changing the boost pressure With these springs you select the minimum pressure For your wastegate. Higher charging pressures can be achieved by using a manual boost valve, electronic boost controller or reprogramming the ECU. Depending on the boost pressure, you will need a small or a large spring, or the combination of a small and a large spring. You get a spring here. On the picture you find all available springs. You only receive the spring as stated above.