You'll also receive a yellow feather, it is suitable up to 1.7 bar boost pressure.
Through numerous openings, this pop off valve has a very rich sound.
If you mount this, your car will sound like a rally car!
The advantages of this blow off valve compared to series:
-suitable for higher boost pressure
-allows greater airflow than original
-faster loading pressure build-up after switching including hissing noise
-very fast response time