STi under aero bits - Page 5
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This is a discussion on STi under aero bits within the Exterior and Appearance forums, part of the Tutorials & DIY category; no extra noise from mine- in town or out...

  1. #61
    Moderating on the run! Big Sky WRX's Avatar
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    no extra noise from mine- in town or out
    "Simplify and add lightness." - Colin Chapman

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  3. #62
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    I haven't posted on this forum in a LONG time.

    I found this link on saab92x.com. Just ordered mine and they will be going on hopefully next week with some other goodies.

    Phil from Element mentioned to me how squirrly the rear-end got at high speeds because I have a wagon, so I've been planning on a mod to improve the aerodynamics. Hopefully this will be what I'm looking for.

  4. #63
    Moderating on the run! Big Sky WRX's Avatar
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    Let us know if it works for you
    "Simplify and add lightness." - Colin Chapman

  5. #64
    Registered User chimchim's Avatar
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    Hey... where are you guys buying the side under bits? I can only find the rear diffuser piece at subarugenuineparts and other places.

  6. #65
    Moderating on the run! Big Sky WRX's Avatar
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    dealer- they are oe pieces off of the 05+ STi -part #'s listed at the begining Jamie at subarugenuineparts can get them too- maybe cheaper than your dealer- just give her the part #'s
    "Simplify and add lightness." - Colin Chapman

  7. #66
    Registered User chimchim's Avatar
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    I looked under my 06 WRX wagon where the side under pieces would go... and it looks quite smooth under there. So... are the side under panels more for evening out the depth of the underside to be flush with the edge of the car?

    It's not like there are a lot of things sticking out down that that the panels actually cover up. The things that do stick out the most (suspension arms, exhaust) can't be covered up. The diffuser, on the other hand seems to make a smoother path over bits and bobs of the section from the rear axels back.

    Anyways, I'm wondering if the rear diffuser itself is effective enough or if it's only worth it (as far as it does work) with the side pieces. I understand that there's a camp of thought that says none of this stuff means anything. However, I try to have a sensitive butt dyno and even small differences are appreciated; and it's just fun to do.

  8. #67
    Moderating on the run! Big Sky WRX's Avatar
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    I'm a believer in that every little bit helps- so if your only doing the rear diffuser it's better than not having anything.

    While it's relatively smooth where the side panels go- it's also a rather largish "pocket" which can cause lift- the side pieces gets rid of those voids.

    I'd avoid camping where anyone thinks that smoothing out the underside will not reduce lift
    "Simplify and add lightness." - Colin Chapman

  9. #68
    Registered User heyitznosaj's Avatar
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    I'm having trouble installing the STi rear diffuser on my 07 WRX. I have no clue where to mount the silver brackets. Am I suppose to drill into the spare tire tray?
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  10. #69
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    just got my under panels on yesterday.

    half way done.

    all done.

  11. #70
    Registered User heyitznosaj's Avatar
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    Quote Originally Posted by heyitznosaj View Post
    I'm having trouble installing the STi rear diffuser on my 07 WRX. I have no clue where to mount the silver brackets. Am I suppose to drill into the spare tire tray?
    anyone?
    2007 OBP WRX LTD
    Cobb Accessport v2 Stage 2
    McCulloch 5000K HIDs h7
    DDM Slim 3000K HIDs h3
    HKS Carbon-Ti Exhaust
    Whiteline 24mm adj. FSB
    Invidia v2 bellmouth downpipe
    Pioneer Avic-D3 w/ CD-I200 Ipod cable & CD-R55 remote

  12. #71
    Moderator YBNormal07's Avatar
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    Have you tried going to a deaer and crawling under a new STi to see how it is mounted? Sorry...that's all I can think of.
    tEh PriUs=teH faSTah!@@!
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  13. #72
    Moderating on the run! Big Sky WRX's Avatar
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    the oe brackets you have are welded in the new cars- you can have them welded (obviously make damn sure they are in the correct spot before doing so)- they alos can be bolted in as well- necessitates drilling into the spare tire well- again measure 3 times drill once
    "Simplify and add lightness." - Colin Chapman

  14. #73
    Registered User heyitznosaj's Avatar
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    The bracket just doesn't line up to anything. I might swing by a dealer and take a peak under a STi. Just hope there are no cops around . Could anyone save me the trouble with pics?
    2007 OBP WRX LTD
    Cobb Accessport v2 Stage 2
    McCulloch 5000K HIDs h7
    DDM Slim 3000K HIDs h3
    HKS Carbon-Ti Exhaust
    Whiteline 24mm adj. FSB
    Invidia v2 bellmouth downpipe
    Pioneer Avic-D3 w/ CD-I200 Ipod cable & CD-R55 remote

  15. #74
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    This is a dope post.
    I custom fabed me a skid plate

    It was originaly made out of 3/16" SS plate but it weighed 40lbs. You could jack the whole car up on it without it bending

    My new one is some 16gadge it works good but that vented on is somthing to consider. I work for a steel shop so it would be easy to make.

  16. #75
    Moderating on the run! Big Sky WRX's Avatar
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    Quote Originally Posted by heyitznosaj View Post
    The bracket just doesn't line up to anything. I might swing by a dealer and take a peak under a STi. Just hope there are no cops around . Could anyone save me the trouble with pics?
    search here and nasioc for diffuser brackets- there should be some pics floating around

    pics will help w/ general orientation, it's still going to take a lot of futzing/measuring to get them aligned exactly right. maybe some two sided sticky tape so you can stick them up and move them around some- checking w/ the diffuser that the holes line up

    also having the rear bracket attached will give you a good idea where the other three need to be
    "Simplify and add lightness." - Colin Chapman

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