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1976 frames.

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Old Jun 16, 2006 | 12:05 PM
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Default 1976 frames.

From what I have read the 1976 frame did not have the holes for exhaust in the frame and had a catalytic converter under the passenger side of the under side. I have to completely separate exhaust and mufflers is this correct or is something not right?
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Old Jun 16, 2006 | 12:10 PM
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Default RE: 1976 frames

The frame for the 1976 model does have the exhaust holes in the frame. The converter was under the passenger floor as indicated.
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Old Jun 16, 2006 | 12:17 PM
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so being that i do not have a converter the exhaust is all after market.
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Old Jun 16, 2006 | 12:57 PM
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Most likely it's AM, or could be a retrofit from an older model.
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Old Jun 16, 2006 | 01:43 PM
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Hmm, my '76 has the crossmember for two exhaust pipes, and it has never had dual exhaust. Has this thing had a different frame or crossmember installed at some point?
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Old Jun 16, 2006 | 01:56 PM
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Originally Posted by JustinGJ
Hmm, my '76 has the crossmember for two exhaust pipes, and it has never had dual exhaust. Has this thing had a different frame or crossmember installed at some point?

Your crossmember is stock. The stock crossmember has the the 2 holes for the exhaust even if your car has a cat on it. I think the only years that have a different crossmember are the 80's.

Last edited by 79corvette; Jun 16, 2006 at 02:01 PM.
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Old Jun 16, 2006 | 01:57 PM
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not sure what the guy before me did. but i thought the 76 had a catalytic converter under the passenger but mine has pipes coming straight from the headers through the frame and each pipe stays seperate and has seperate mufflers.
I am trying to learn as much about auto restoration and as much about my vechicle as possible.
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Old Jun 16, 2006 | 02:04 PM
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Originally Posted by Grim
not sure what the guy before me did. but i thought the 76 had a catalytic converter under the passenger but mine has pipes coming straight from the headers through the frame and each pipe stays seperate and has seperate mufflers.
I am trying to learn as much about auto restoration and as much about my vechicle as possible.

You are correct that the 76 had a cat. All Vette's from 75 and later have cats. Most owners however get rid of the single cat and exhaust and replace it with true duals and no cats. Which is what you have.
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Old Jun 16, 2006 | 02:20 PM
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The 76's stock exhaust was a 2 into 1 (convertor under the passenger side) into 2 mufflers. The stock cross member had 2 holes and 77 and later only had 1 hole in the cross member.
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Old Jun 16, 2006 | 02:30 PM
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Originally Posted by 76texvette
The 76's stock exhaust was a 2 into 1 (convertor under the passenger side) into 2 mufflers. The stock cross member had 2 holes and 77 and later only had 1 hole in the cross member.
77, 78 and 79 also had 2 holes in the crossmember.

Last edited by 79corvette; Jun 16, 2006 at 02:43 PM.
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Old Jun 16, 2006 | 03:00 PM
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Originally Posted by Grim
not sure what the guy before me did...
Changed to dual exhaust and 86ed the catcon.

Originally Posted by Grim
...I am trying to learn as much...about my vechicle as possible.

Got an owner's manual? Order a reproduction if you don't have one.

Order the '76 assembly instruction manual (AIM). There's a world of information in the AIM.

Order the NCRS Judging Manual for 1976. Whether you want to go NCRS or not, lots of valuable information there specific to the 76s.

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Old Jun 16, 2006 | 05:34 PM
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if there are headers on the car its highly probably the rest is not stock or anywhere close. If you are going to open up your exhaust with headers why would you leave the stock pipes and cats? Just my .02

ive also got an AIM...best 20 dollars ive spent on my car
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