Engine/Power - EJ20T (pre-2006 WRX and JDM) There is replacement for displacement, it is forced induction - OEM 2.0 liter turbo engines in the USDM WRX. 90-94 Legacy Turbo EJ22 turbo engines can also be discussed here.

Gruppe-S headers (what kind of gain can I expect?)

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Old Apr 10, 2007 | 02:42 PM
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Gruppe-S headers (what kind of gain can I expect?)

hey guys I just bought a used gruppes header and just wondering how much gain I should be expecting untuned. I heard it should give me roughly 10whp.
Old Apr 10, 2007 | 04:01 PM
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did you get the gruppe-s sticker with it?
Old Apr 10, 2007 | 06:34 PM
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he bought it used, so id say no on the sticker. 10whp sounds like a lot for just a header.what other mods do you have?
Old Apr 10, 2007 | 08:07 PM
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headers will make more power if you have more mods. if you just have exhaust it will make less than if you have a full turbo setup. I would say around 5-10hp. i would recommend getting it tuned to get the full power out of it and to not mess up teh engine to much.
Old Apr 11, 2007 | 12:25 PM
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I'm running vf39 setup so yea not stock turbo. I installed it yesterday seems like a slight gain in power the sound is also slightly different. I will ask for a quote for a touch up tune.
Old Apr 11, 2007 | 12:28 PM
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you should have a more raspy sound to it.
Is the header coated?
Old Apr 11, 2007 | 12:45 PM
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Originally Posted by Jake
I'm running vf39 setup so yea not stock turbo. I installed it yesterday seems like a slight gain in power the sound is also slightly different. I will ask for a quote for a touch up tune.
be sure to check out GST Motorsports for the tuning (=
Old Apr 12, 2007 | 02:32 PM
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yea its definately more raspy and yea i might want a couple more mods before another tune =P
Old Apr 14, 2007 | 12:39 PM
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perrin equal length headers > gruppe-s headers
Old Apr 14, 2007 | 06:20 PM
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crucial P&P manifold > *
Old Apr 14, 2007 | 09:07 PM
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Originally Posted by SubyN00by
crucial P&P manifold > *
GST Motorsports matched stock headers and coated Injen crosspipe > *.*



Mike
Old Apr 15, 2007 | 08:36 AM
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Smile

Originally Posted by Jake
yea its definately more raspy and yea i might want a couple more mods before another tune =P
wat do u mean raspy sound? its not that anoying sound ur ssaying right? how do u like the sound? can you describe wat you mean by raspy sound?
Old Apr 15, 2007 | 10:38 AM
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Originally Posted by GST Motorsports
GST Motorsports matched stock headers and coated Injen crosspipe > *.*



Mike
yeah.................I'll call you on Monday.
Old Apr 17, 2007 | 02:58 PM
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Originally Posted by lburrrna
wat do u mean raspy sound? its not that anoying sound ur ssaying right? how do u like the sound? can you describe wat you mean by raspy sound?
its just slightly different like makes the car sound little louder and by raspy hm...kinda hard to explain have u heard other cars with headers?
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