Quote Originally Posted by Bob_n_Cincy View Post
Thanks Sixstar,
This helps explain why a tune is needed if you change regulators.
It also explains why Subaru put two "Fuel damper valve" in my fuel system. Their purpose is to get rid of pressure pulsation.
Bob




It's possible to add dampers directly into your fuel rails on some aftermarket rails. Radium has a provision for them and sells them.

That's the damper in the middle of this Radium Subaru rail: