Hey guys, This a cool little idea I had for a cheap (<$100) intake that will work, have a nice factory look and fit, and install very easily. Hope you like it. :)

The Car (06 2.5i):

http://img525.imageshack.us/img525/4646/0825071924ce8.jpg

The Parts:
-GPmoto intake elbow (about $45 http://gpmototech.com )
-Stock WRX/STi ram air intake ($0 - $15 at your local subi dealer)
-Performance filter ("Green" was about $40 at any murry's or autozone)

http://img247.imageshack.us/img247/4435/1000040rp3.jpg

The Result:
-A slight performance gain
-A better looking engine bay
-A nicer sound
-A full wallet

http://img510.imageshack.us/img510/4350/0308081334anm8.jpg

Nice and clean I like it. Nice work

Nice. Do you notice any low end torque loss by removing the snorkus, as discussed by Willi?

I gotta question, what is that backwards J looking thing on the stock intake tubing just behind the MAF? What exactly is the point of that besides looking ugly?

It serves the same purpose as the snorkus, quiet the intake noise.

looks clean man. If i had to do it over i would of gone your route. i feel that my CAI is a little bit too loud.

Thanks for the positive feedback guys

Nice. Do you notice any low end torque loss by removing the snorkus, as discussed by Willi?

I actually felt some low end gain. I put an sti axleback on a couple of months ago and I felt some low end loss and high end gain with that, but now removing the snorkus seemed to give me back the low end power that I lost and then some.

I still would like my low end to be a little better so im thinking perrin lightweight crank pulley.

And sylon Im currently looking for a hose/pipe to replace the one with the ugly backwards J deal.

No, the axle back does not affect performance in ANY way, that was your imagination. All it does it change the sound.

mabe it just felt slow for such a beastly sound :lol:

put an sti axleback on a couple of months ago and I felt some low end loss and high end gain with that
And that, ladies and gentlemen, disqualifies this guys' butt dyno from having an opinion we should listen to.

While I'd be willing to believe people might not feel the problems caused by the snorkus delete if they are still running stock CL/OL mapping, anyone who thinks an axleback made a damned bit of difference is so out of touch with their car it's just frightening.

gimme a break dude, I got the axleback so shortly after I got the car. I didnt really have that much time to know exactly what was going on.

anyone who thinks an axleback made a damned bit of difference is so out of touch with their car it's just frightening.

ive had 5 diff mufflers on my car and i could feel a difference. but only a difference between the chambered ones and the straight-through ones. the STi axleback is virtually the same as the stock one.

Say it with me: Nothing after the stock headers and cats can make a difference.

say it with me: this thread is about intakes, not exhausts

Say it with me: Nothing after the stock headers and cats can make a difference.

go drive your car up a hill with and without a muffler on and tell me its the same.

Exhaust note and performance are very different things, louder doesn't necessarily = better flow. The cat is the single most restrictive part of the exhaust stream therefore any modification after the fact is pointless (regarding performance). Fundamental fluid dynamics- flow is always limited to the most restrictive point in the stream. Had a Subaru tech point this out after I had my SPT muffler installed @ the stealership.:cool:

go drive your car up a hill with and without a muffler on and tell me its the same.

It'll be louder that's for sure :p

It'll be louder that's for sure :p

i drove my car around one day with no axleback on and my gas pedal was a wet noodle and my car was a snail.

so what exactly is being done here with the GPmoto intake elbow, Stock WRX/STi ram air intake, and Performance filter

In theory, the setup uses the WRX trumpet to bring colder air in from the grille (which may or may not work as the turbo hoods have extra gaskets to force the air into the trumpet), the elbow sends the air around the corner into the airbox, and the filter filters.

The elbow isn't necessary at all in any way. Sending the air into the fender via the trumpet and letting it find its way into the airbox (which it will do) will work at least as well. In fact, the trumpet may not be necessary either. The fender is pretty well contained and, when moving, is pressurized via the fog light opening and other gaps on the front.

one thing, the trumpet doesnt actually fit onto the stock snorkus, they back end of the trumpet and the front end, (the square) of the snorkus are different sizes. Technically speaking for this specific application, the elbow is necessary for fitment reasons only.

Will, not sure i understood your second part to that last post about the fender. Shouldnt the fender be nullified for the most part because the snorkus is still in place? isnt the vast majority of the air coming from the spot behind the headlight (if you were to remove the trumpet)?

The trumpet doesn't need to fit anything perfectly. It's still sending air in the general direction of the airbox, which is what you need.

The gp-moto elbow is another method of snorkus-delete. What I'm saying is that there's no difference between running the elbow and just a basic snorkus delete (on which my feelings are well known).

If you can get it for free, a WRX/STi hood (gasketing intact) and the WRX/STi intake trumpet feeding the stock RS snorkus is probably the best setup.

Hacking a duct from the fog light up to the snorkus would be a close second.

one thing, the trumpet doesnt actually fit onto the stock snorkus, they back end of the trumpet and the front end, (the square) of the snorkus are different sizes. Technically speaking for this specific application, the elbow is necessary for fitment reasons only.

Are you sure the WRX trumpet part doesn't fit the stock 2.5i snorkus? In the OP's pic they look to be the same shape.

that is more clear, thanks will. I was more clarifying for people who would have taken you statement of "letting it find its way to the airbox" and using fender instead of snorkus, which could be misconstrued as no snorkus for some.

sorry to pick apart every word, but i figure it will result in less people doing things like double posting in caps not understanding and thinking that trumpet>no snorkus> filter would be a good set up for some reason.

semaj: i am not 100% sure about the op's case but i do know in my specific application (05rs) that, despite the fact that the piece are the same shape, they are not the same size. This may be different for 06+ but for me, this is the case. if op wants to chime in? are the square holes the same size?

Are you sure the WRX trumpet part doesn't fit the stock 2.5i snorkus? In the OP's pic they look to be the same shape.

They're the same shape and in the same location, however, the WRX part is about 1/4" bigger all around than the RS part, leaving a gap.

semaj: i am not 100% sure about the op's case but i do know in my specific application (05rs) that, despite the fact that the piece are the same shape, they are not the same size. This may be different for 06+ but for me, this is the case. if op wants to chime in? are the square holes the same size?

They're the same shape and in the same location, however, the WRX part is about 1/4" bigger all around than the RS part, leaving a gap.

Good to know boys, thank you :D

I know, Im digging up an old thread, but better than making a new one right?

I was thinking about doing something similar, but keeping the snorkus by putting a buddies WRX "trumpet" on my 2.5i. Obviously, its a little too big. But what if I used his snorkus so it fit, and sealed up properly. Has anyone else done this? Is his snorkus different than mine in that it wouldnt fit the airbox? Are the WRX snorkus and the 2.5i snorkus the same thing, or are they different in ways other than the size of the tubing that matches up to the trumpet? If they are different, are the differences great enough to cause the resonance that the snorkus is supposed to tune out?

They're the same shape and in the same location, however, the WRX part is about 1/4" bigger all around than the RS part, leaving a gap.


nothing a little duct tape can't fix.

i have the WRX trumpet duct leading to my stock intake system and in order to not seal off the duct, i cut away some of the leading-edge weather stripping on the passenger side of the hood. funny you mention duct tape...i may just do that to seal the trumpet to the snorkus.

since doing that, my air filter changes have become almost twice as frequent due to how much dirt the trumpet is collecting...which leads me to believe its definitely getting exposed to a lot of air.

i can't say it made any huge change with the stock setup, but with the Williaty hybrid-take i'd be willing to bet there is some power there.

the WRX snorkus (Helmholtz resonator located in the fender) is physically smaller (less volume) and slightly different shape that the N/A snorkus. i would guess it is because the frequency that causes the vibration of the intake air at certain engine speeds/loads is lessened or changed (to a higher frequency) when a turbocharger compressor is located in the intake track. It might be better to have the WRX snorkus instead of no snorkus.. but dont take my word for it.

Thanks for the replies. I may just try it and see how it works out.

can you post a DIY?
i am afraid of buying a SRI because i read that they have problems

Who was that question directed to?

anyone who can make a safe intake

i really want a SRI because it sounds really good and its safer than CAI's but they have problems with imprezas

anyone with an 05+ na impreza who is thinking about running anything other than williaty's hybrid intake is an idiot. straight up.

anyone with an 05+ na impreza who is thinking about running anything other than williaty's hybrid intake is an idiot. straight up.
I cant find anywhere or anything about these hybrid intakes
ive tried searching

I cant find anywhere or anything about these hybrid intakes
ive tried searching

http://forums.nasioc.com/forums/showthread.php?t=1471819


first sticky at the top of the NA forum. :rolleyes:

anyone with an 05+ na impreza who is thinking about running anything other than williaty's hybrid intake is an idiot. straight up.

I dont know about idiot, but definately ignoring useful information. I want to combine williatys intake with the WRX trumpet and perhaps the WRX snorkus, depending on if the WRX snorkus will tune out the resonance. Either way I go I will have a Hemholtz resonator whether it be stock or WRX in my fender.

I cant find anywhere or anything about these hybrid intakes
ive tried searching

Its at the top of the NA forum in a sticky. You really cant miss it if you search though. I mean, REALLY cant miss it.

I dont know about idiot, but definately ignoring useful information. I want to combine williatys intake with the WRX trumpet and perhaps the WRX snorkus, depending on if the WRX snorkus will tune out the resonance. Either way I go I will have a Hemholtz resonator whether it be stock or WRX in my fender.

i have ran the stock intake, the stock intake with a cone filter instead of the stock airbox, a SRI, a CAI, and the williaty hybrid and the williaty hybrid is the best set up BY FAR, like its not even a fair comparison.

high flow panel filter with the intake definitely makes a huge difference too. and i plan on adding the wrx trumpet short ram thing.

i really want a SRI because it sounds really good and its safer than CAI's but they have problems with imprezas
A SRI is no safer than a CAI. They are equal. However, as others have said, for an 05+ NA, the hybrid is probably a better idea than either a CAI or a SRI.

yeah ive seen that thread but is there any specific DIY

Read through the whole thread. If you cant figure out of to put it on by all of the information there, you should probably get someone else to do it for you. There is a DIY out there somewhere though I think.

Williaty-Whats your take on this whole WRX snorkus idea of mine.

WRX trumpet is win, I've got one, large reduction in IATs.

WRX snorkus is fail, doesn't flow any better than the RS one and is tuned wrong.

I figured flow wouldnt really change. Wasnt sure whether it would tune out the resonance though. How is yours secured since they dont really fit properly?

Close enough is close enough :D

:lol: If it works for you itll work for me.

Even worse, one of the bolts sheared off due to rust. So the trumpet is just kind of hanging out in there held on by one little bolt right at the corner. It'll either come off during a stage some day or it won't.