Yestaday I fitted the forge dumpvalve to my 06 Impreza, I do feel rather ripped off, as it gives a weak and quick psssst and at 3,000rpm I feel it comes in too late.

After reading some older threads will greasing the internals or changing the spring inside make it pssst more, or should I accept I need to buy a louder dumpvalve.

 

More Boost = more ppssstt.

i thought mine was quiet before the car was mapped now im well pleased

 

Mine is obscene! lol

 

The dump valve.......

HKS SSQV

Best sound around

Andy

 

have to agree with the above, got the new one on and sounds sweet

 

dont you find you get embarrassed or get bored by them? I swap mine on a regular basis (ive consequenstly lost the bung) but now i find the noise of de-snorkeling much more fun

 

I thought mine was obscene when I had a top mount and a bit of extra boost.

But with a front mount it sounds like swords clashing at 100db!

 

Put the OEM one back one (as its the best for purpose) and do a snorkellectomy as mentioned above.