Originally Posted by olliecampbell

I got a whole cleaning kit with mine that I havent even opened so not sure whats in it. Im a bit wary of adding oil to it, because of the old MAF issue.

I think its been on for a couple of years (about 5-10,000 miles!!!), I'll try and dig out the receipt to find out. But hopefully i'll get to it at the weekend and take some pics for you.....

Originally Posted by marmski

This is normal mate... i couldnt hear my dump valve at all for about the first 3000miles on my MY05 STi (although the first 1000 were done below 4k revs... and driven really carefully for running in).

After i gave it a good blast with about 3000 on the clock one day, i switched it off and it wasnt doing it... then the next time i went out (and ever since) its had the sound of the dump valve when i change gear sometimes. Took it to the local Impreza specialist and they said its completely normal...

--Back on Topic--

I have fitted the STi panel filter this week, and the car idles 100RPM lower now when upto temp (exactly 500RPM idle.. as opposed to 600-650 before hand). It also feels a little more refined/smoother, and spools about 500RPM sooner than before. Recommended for £50.00

Also fitted this:

Nice piece of kit... and on its own made things feel a little sharper. (Not suprising though if you take a look inside the standard item you will realise why.. its shockingly bad for smooth airflow)
Here is why:

Originally Posted by v8voodoo

Yup, Green cotton filter here and I've got the "dump valve" sounding noise when pressing on and changing into second and third in an '06 STi. Is this normal..? Seems to be getting more pronounced as the miles roll by.

Originally Posted by olliecampbell

Well here you go:

https://www.scoobynet.com/general-te...ml#post7180507