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.

Helix Downpipe question

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Old 12-21-2004, 12:29 PM
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I've got the helix. It removes both cats. I'm not sure about the PDE. I imagine that if you go back to stock for tests that you won't have to worry about the check engine fix. Just leave it in. No one would know the difference. Hope this helps.

ron
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Old 12-21-2004, 02:22 PM
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I don't think so, unless they follow the wire all the way to where you splice in the resistor. I doubt they would do that.
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Old 12-23-2004, 11:29 AM
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I have the helix up/dp and I wish I had a cat
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Old 12-23-2004, 05:03 PM
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Originally Posted by VIBEELEVEN
I have the helix up/dp and I wish I had a cat
Why do you wish you had a cat? Is it too loud? I was wondering how much louder my car would be with a catless downpipe, because i already have the APEXi N1 catback and it isn't loud enough for me
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Old 12-24-2004, 02:42 AM
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Originally Posted by WikdRX
Why do you wish you had a cat? Is it too loud? I was wondering how much louder my car would be with a catless downpipe, because i already have the APEXi N1 catback and it isn't loud enough for me
if u go catless it'll be LOUD.

it's actually decently loud on my car(w/ evo), but i think N1's louder.

btw, get the helix, it's awesome.
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Old 12-24-2004, 07:50 AM
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Mines not too loud, cause I still have the stock catback, the wattery eyes is what gets to me
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Old 12-24-2004, 09:06 AM
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Catless w/ a hush is not bad at all... unless you're at WOT at high loads. It looks stock and it just sounds meaty.

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Old 01-01-2005, 10:28 PM
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save some money and get the Helix. do a search for the mechanical cel fix (no splicing of wires) and you're good to go
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Old 01-02-2005, 01:08 PM
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Thumbs up go with the HELIX

i got the HELIX up/down pipe. its the greatest i EVER invested. if you are worried about noise, dont get this one. i like the turbo sound!
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