Hello,
I installed a Forge DV spacer on my golf gti mkv 2009 (TSI engine).
the car has OEM Diverter Valve revision G.
After installing the DV spacer, i had the "pshhh" sound i suppose to receive.
After driving the car for about 20km, the sound is gone!
Have anyone encountered this issue before? is my OEM diverter valve defective?