Hi,

i have a 54 sti and would like to knwo which valve to get. I have £250 to spend. I would like a crips fast woosh?

My dealer says the HKS is the best? if so any tips on where to get one?

Thanks Kieran

 

Did the dealer also tell you that by fitting one, you would invalidate your warrenty?
VTA (vent to atmosphere) dumpvalves, especially the likes of blitz and hks, can cause running and idling problems on impreza's? The standard recirculating item is absolutly fine and more than adequete. If it is just the noise that you are looking for, then maybe go for a wing position mounted induction kit?

 

Don't bother mate, NO BENEFIT AT ALL unless you are pushing big power ie 300bhp plus and its then that the oe ouit can start to fail. unless all you want is noise??.
Sandman

 

You can get the noise by simply removing the Ram-Air Scoop and inner wing Resonator (intake silencer) and fitting a decent (JR Racing/Green/K&N) panel filter. Good induction noise too for less than 50 quid and no detremental effects

Read THIS quoted earlier to a similar newbie on THIS THREAD.

 

Thanks for the info, it is the noise that i like but i may give it a miss if it is likly to mess things up

K

 

is it a easy job to remove the air scoop and silencer? isent it a good thing to have the air scoop to get cold air to the filter?
can you just remove the silencer?

 

The scoop doesn't bring any cool air in Have a look where it begins and then look at the rubber seal along the leading edge of the bonnet. The only air that will make it into the engine bay will pass through the rads and will hence be warm, and you don't really want to be sucking in engine bay air anyway. There's plenty of air gets into the wing, and on my WRX I improved this by drilling out a triangle of the plastic on the foglight mounting plate behind the foglight trim where there are some decorative (not any more ) vents.

The silencer sits between the scoop and airbox, so there's no point removing one without the other. One of the benefits of this mod is to get the cool plentiful air from the inner wing instead of the warm mucky stuff from the engine bay, so leaving the scoop feeding the warm stuff into the wing sort of defeats the object.

2 bolts hold on the scoop which just pulls off once they're removed. The silencer is a little more involved. Again it is held in place by just 2 bolts, one beside the airbox and another which can be access either through the foglight aperture, or by removing the O/S headlight. Once freed it needs to be extracted through the wheel arch by prising back the liner. This is easy, requiring the removal of a few of those plastic pop fasteners. Finish off by duct taping up the holes left between the engine bay and wing, make a seal around the filter box where it meets the wing (I used some rubber hose) and fit a decent panel filter. Works a treat IMHO

 

Sounds good, you got any pic's. Am looking for a new filter at the mo as well. Whats is inside the silencer?

K