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2006 Subaru Impreza 2.5i

bdentonbdenton Posts: 4
edited March 2014 in Subaru
Hello everyone, I have a couple questions that I figured could be answered fairly soon here. I have a 06 Sub Impreza 2.5i. I purchased this car last Dec and I am 18 yrs. old, meaning I would have purchased the STI or WRX but I can't afford the insurance. So here is my situation, I am now looking to do some performance modifications to it. I KNOW SUBARU has created the line of Imprezas to come how they want them to run and tuned them the correct performance stock. BUT I want to put the money into mine to make it run better than it does now. I am looking to install a Greddy catback exhaust onto for the 10+ h.p I will get out of it with the performance sounds as a plus. I also want to install a cold air intake which should make it get a little better mpg plus a couple horses. I am also looking to do an aftermarket turbo install into it but I haven't done much research into that yet. I am wondering if anyone could give me some advice as to what exhaust system would be best for my non turbo engine as of this moment and a nice air intake for a 06. I would greatly appreciate any comments or advice from you. Thanks for your time.


  • ateixeiraateixeira Posts: 72,587
    First, decide if you will turbo or not, because that makes a big difference. You want about 2.25" pipe for a N/A engine, but maybe about 3" for a turbo.

    You can stay normally aspirated and still do a lot - intake, exhaust, lighter/underdrive pulley, cams, etc.

  • bdentonbdenton Posts: 4
    Ok my next question would be if I didn't install a turbo for a while due to lack of cash due to college, would installing a exhuast for a turboed car do any harm or would it just not work to its full potential. Sooner or later I will install a aftermarket turbo into it but I want to put a nice exhuast, air intake, headers, etc. Any advice on what company will give me the most umff for the buck? Thanks for your help
  • ateixeiraateixeira Posts: 72,587
    would it just not work to its full potential

    That's about right.

    Cobb tuning is a big one, I'd consult with them about any forced induction applications.

  • As far as your intake goes, i put in a weapon r secret weapon inatke, it makes my car sound great and added a little horsepower, here is what it looks like

    I'm having a hard time finding a carbon fiber hood and a bdy kit for my 06, did you find any?
  • bdentonbdenton Posts: 4
    As far as putting a carbon hood w/ or w/out scoop for the 06 you pretty much have to go through the dealer. All the hinges and fitting is identical but there isn’t any aftermarket hoods built for the 06 model that I have found. I have done quite a bit of research because Im going to do the same thing to mine. The dealership quoted me about 500 for the hood w/ indent for scoop and about 200 for scoop so you’re looking about 700+ 100 for paint. I would go through the dealership so you’re sure to have a warrantee for the shipping, through an internet site the hood can be damaged through shipping and you get the shaft. But that’s my input on the carbon hood; it definitely gives the car that STI sporty look, which Im going to do. Thanks for the site for the intake, its exactly what Im looking for.
  • Thanks for the info, i want the carbon fiber hood though, i found a body kit for our new 2006 subaru bt it's crazy expensive, the link is

    the site i linked you to before with the intake is my site, own it so i am trying to open an account with the body kit company to see if i can get it cheaper, i will let you know how it turns out
  • maybe this will answer your ? about an exhaust also i cant find and really want one. Want a pretty good one to

  • go to they make good exhausts
  • Yeah but i dont think have any for a impreza 2.5i that i could find
  • do you have to buy a whole new hood? why couldnt you just get a wrx hood scoop and have some specialist mount it on the 2.5s hood?
  • i wanted a carbon fiber hood, thats why i cant get a wrx hood from subaru
  • hey so i saw that you own that site and you put that intake in was it for a impreza 2.5i. Does it sound good
  • i love the way it sounds, its really sexy!!!
  • yea but is it for a impreza 2.5i
  • dont go to subaru go to a collision specialist, they can order WRX hoods for ya and mount it onto your 2.5, i went down yesterday and asked if they could get WRX hoods for 2006 and they said yes cause they dont repair hoods, they either buy new ones or find wholesale ones at junk yards. Its about 500$+ paint for me.
  • subby06subby06 Posts: 12
    is the intake for a 2006 subaru impreza 2.5i? is it easy to install?
  • the intake is easy to install, just follow directions, me and my guys put it on.. You are right i spoke to greddy and the exhaust wont fit, i'm working on finding one. The wrx hood that i want i want it in carbon fiber, the collision specialist cant order it right?
  • oliasolias Posts: 4
    Question, you bought the 306117 from secret R weapon and replaced it with your standard box filter?

    Are there any other parts needed? Does the secret weapon intake tube has a inlet for the air massflow flowmeter.

    Is there some instruction guode on the internet to look at.

    Thanks for the help
  • guestguest Posts: 770
    it comes with instructions. This was the first thing that i have ever put into a car. I took it to a subaru place to c if i did it right and they said it was how they would do it.
  • oliasolias Posts: 4
    Thanks, I will give it a try. The information is unfortunately limited on the web, K&N gives ex. a better instruction how to install, my mayor thought is , on all pictures from secret R weapon is that I cannot find a picture with the air density sencor infitment for the subaru, some of them (the pictures I saw) are working with a vacuum only connection.
  • it comes with all the instructions you need, i am a girl and i put it in myself, it comes with the censor
  • ateixeiraateixeira Posts: 72,587

    Why would girls be any less capable? My 7 year old daughter helped me bleed my brakes. :shades:

  • subby06subby06 Posts: 12
    Does anyone know of any exhaust systems or spring kits. or any parts at all would be cool too. Its would be for a 2006 impreza 2.5i Price isnt really a factor
  • there arent any exhausts yet, but i did find a carbon fiber hood, really nice looking. you can go to to look at it. I opened an account with them and ordered it, for like $600. Chargespeed and ingsusa make a bodykit for our impreza
  • You got that for the 06 model? I like the carbon fiber scope but I looking for the WRC style vents. Nice looking hood though indeed.
  • yes i got it for the 2006 model, it looks nice
  • oliasolias Posts: 4
    I just received the secret weapon intake with all parts included.

    I have read the instructions and looked at the pictures.

    Instruction #7 is all clear but #8 puzzles me, perhaps because english is nit my language.

    7 Measure from valve cover PCV port to intake pipe port. Replace with supplied 10mm hoses.
    8 Use "T" fitting to crankcase PCV port to 10mm port on intake pipe. Replace with supplied 10mm hose.

    Do you have some pictures on web zootedemalish? Or can you send some pictures of your assembly?

    [email protected]

    I would reallt apreciate your help.

    Mechanically I have no issues but working on this part, cars, is completely new to me.

    Thanks for all the help
  • subby06subby06 Posts: 12
    Would it be possible to send pictures of the hood on the car. Email is [email protected]

  • yes, i will send pics. The hood is coming in tomorrow or wednesday i will have it on by friday and email you pictures
  • i will email you pictures of my intake tomorrow
This discussion has been closed.