I have recently fitted a K&N induction kit to my 94 wrx, but now when my dump valve operates it is exhausting through the induction filter loosing that great sound I used to have. Can anybody Help

 

Ello. I dont know if ths helps but when I got a Forge dump valve the spring that was in it was to hard thus when I let of the gas the dump valve would not go off[unless i was on full boost] resulting in all the presure going back through the turbo and out through my kn giving off flutter. I took it back to my subaru dealer where i bout the BOV and they replaced the spring FOC. I hopr this helps.

 

What colour spring are you using now?