2.0L LSJ Performance Tech 205hp Supercharged SS tuner version. 200 lb-ft of torque.

Just installed header and catless downpipe

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Old Aug 29, 2011 | 07:23 PM
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punksk8ter62's Avatar
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From: Winder
Just installed header and catless downpipe

And holy hell is it fast. But it kinda hisses at low rpms. Is that normal?
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Old Aug 29, 2011 | 07:35 PM
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what do you mean "hiss"? i would re-tourque all of your bolts after a couple heat cycles.
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Old Aug 29, 2011 | 10:34 PM
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could be an exhaust leak
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Old Aug 29, 2011 | 10:38 PM
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sounds like needs retourque
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Old Aug 29, 2011 | 11:11 PM
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From: DFW
usually catless creates a hiss under load, mine did it even though there were no leaks.
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Old Aug 29, 2011 | 11:59 PM
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Yea. I'm gonna retorque in the morning. But it's only when it's under load. And I cant smell n e thing under the hood. Feels like I lost a little low end but gained a huge amount of top end. I'm assuming it is because I opened it up so much. Lol
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Old Aug 30, 2011 | 12:01 AM
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not a catless fan but sounds good sometimes
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Old Aug 30, 2011 | 09:25 AM
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update: i went out this morning and tried to listen for a leak if one but at an idle and and when i rev it in the drive way it doesn't make the "hiss" or rattle snake noise. only when i'm driving it. Ive never done any exhaust until this. does that sound like it may be a leak?
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Old Aug 30, 2011 | 01:11 PM
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From: Winder
http://youtu.be/_rRnf0-Fg4w
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Old Aug 30, 2011 | 04:53 PM
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sounds normal to me
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Old Aug 30, 2011 | 06:49 PM
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seafoam it if youre not sure about an exhaust leak. mine had a slight hiss under some load too though when i put mine on.
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Old Aug 30, 2011 | 09:01 PM
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Just seafoamed it and it leaked where the header and downpipe. Gonna replace it tomorrow.
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