Both springs?
So no big change then?
Steve,
There has been reports that some K04 cars have been getting the fluttersound when you let off the throttle, like with the Forge spacer/ ITG open cone filter and standard diverter valve.
There is a bulletin on the GBE website (Link in this thread somewhere) that says you can achieve the flutter by removing the spring behind the brass plunger.
This will be at the sacrifice of throttle response. Yes there is a difference, i've noticed it more sub 2,800/3,000 rpm much more alive.
Dan