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Catalytic converter question

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Old Jun 23, 2004 | 06:13 PM
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Default Catalytic converter question

Yeah I'm going to show my inexperience with this but I don't care. Just spent a little bit looking up underneath my car trying to locate the stock catalytic converters. I was under the impression that the hump in the passenger side of the interior is because of the catlytic converter.

But from looking under the car I can't see the exhaust pipes going into anything in that area. The only thing I see are the pipes coming off the engine seperately, then going halfway back the car to where they merge together and then they head into the muffler at the back before coming out again. So where are my cats, or am I just really blind?
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Old Jun 23, 2004 | 06:46 PM
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They are right behind the manifolds kinda tucked up a bit. The hump serves no purpose on our cars other than to take away legroom for passengers.
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Old Jun 23, 2004 | 07:10 PM
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The hump is there becuase the LT1 cars had the cat(s) there. GM redesigned the exhaust for the LS1, but they didn't change the car's floor pan. That's also why the left(driver) side section of the y-pipe is flat. GM needed to hump the floor there, but didn't.
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Old Jun 23, 2004 | 07:22 PM
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On mine, one cat is right behind the header, and the other was under the passenger side floorboard, where the hump is.
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Old Jun 23, 2004 | 07:22 PM
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If im correct, the hump is there to make room for the drive shaft. It does make sense.


As to the hump being for legroom....if anything, the "hump" lessens the amount of legroom. Just sit in the back and see.

Last edited by Big Jimbo; Jun 23, 2004 at 07:38 PM.
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Old Jun 23, 2004 | 07:40 PM
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Originally Posted by Big Jimbo
If im correct, the hump is there to make room for the drive shaft. It does make sense. As to the hump being for legroom....if anything, the "hump" lessens the amount of legroom. Just sit in the back and see.
Your talking about a different hump

They're talking about the hump on the passenger side floorboard.
You're talking about the driveshaft tunnel.
BTW, I hate that stupid hump .
The good thing is that I'm never on the passenger seat, so it only bothers me to look at it.
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Old Jun 23, 2004 | 07:45 PM
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ok......i feel real fuking stupid
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Old Jun 23, 2004 | 08:19 PM
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Yeah I noticed that the driver's side part of the y-pipe was really flat, confused the hell out of me looking at it. But yeah, when I looked up towards the engine tracing the exhaust back, I saw the pipes coming out of what could have been a small box, which I'm assuming were the cats, but they're really tucked in there then.
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Old Jun 23, 2004 | 11:05 PM
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Originally Posted by Big Jimbo
ok......i feel real fuking stupid
Well that was a stupid stupid thing you said
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