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Hissing sound after off road pipes? HELP

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Old 06-27-2004, 02:33 PM
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Question Hissing sound after off road pipes? HELP

Alright I just installed Mufflex off road pipes and TSP Rumbler and now I hear a MUCH MUCH louder exhaust but from the front of the car I hear a hissing noise that gets louder as the RPM's go up. I sat under my car while it was running and had my dad rev a bit and there are NO leaks at all. I felt all around where the exhaust is connected here and there and felt no air with my hands and I put my ear to everywhere it's bolted as well and no sound.

The sound is really like a supercharger whine and is very smooth. Could it be my intake sucking in more air or something now that exhaust is opened up??
I have had leaks before and it doesn't sound at all like this does, It's really not a bad sound just makes me nervous.
Old 06-27-2004, 03:03 PM
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Hmmm could be because intake sound and an exhaust leak don't even sound the same. I have a K&N FIPK on mine and I can hear the sucking sound occasionally when the exhaust doesn't drown it out
Old 06-27-2004, 06:31 PM
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I hear it all the time and it is loud.
Old 06-27-2004, 06:35 PM
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like when you hold an "S" sound that gets louder and louder as rpms go.
Old 06-27-2004, 06:35 PM
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The hissing sound is very normal. Every LS1 i've ever heard without cats hisses like that. My MACS did it, and my Longtubes do it. You learn to block it out...
Old 06-28-2004, 06:30 PM
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Thanks Damian.
Old 06-29-2004, 04:27 PM
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hmm, that explains alot, i was kinda wondering about that too, doesnt bother me at all, but just wondered what it was, now i know, and knowing is half the battle....GO JOE!!! sorry, that was lame, i know.




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