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Please help with corvette exhaust

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Old Feb 9, 2010 | 08:22 PM
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Default Please help with corvette exhaust

I just bought full length headers for my 1981 Corvette. I was just going to run pipes no cat. I was thinking about running headers into an x-pipe and then straight back into mufflers. I know the stock exhaust is a true dual exhaust and each side is ran back individually. Can you use an x pipe on a 1981 corvette or do I have to run each side back separately? Also whats the best sounding muffler for the car? I have been looking at Gibson and Flow-Master but I wanted to hear other people opinions on mufflers.
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Amf133
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Old Feb 9, 2010 | 09:01 PM
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Originally Posted by amf133
I just bought full length headers for my 1981 Corvette. I was just going to run pipes no cat. I was thinking about running headers into an x-pipe and then straight back into mufflers. I know the stock exhaust is a true dual exhaust and each side is ran back individually. Can you use an x pipe on a 1981 corvette or do I have to run each side back separately? Also whats the best sounding muffler for the car? I have been looking at Gibson and Flow-Master but I wanted to hear other people opinions on mufflers.
Thanks
Amf133
The stock exhaust on an 81 wasn't a true dual system. There was a Y-pipe to the catalytic converter and then the exhaust split into 2 pipes to the mufflers. I don't know what year the second hole was removed from the trans crossmember but it was some time in the 80's.

If you don't have to worry about emissions or OE inspections you can use any exhaust that you want. You can put X-pipes on the car if you like. You will get many opinions on what mufflers sound best. I have a Magnaflow 16841 system on my car with an X-pipe and I'm happy with the sound.

Search on 'mufflers' or 'exhaust' and you will have enough reading for days.



Rick B.
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Old Feb 9, 2010 | 09:57 PM
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Someone who has done this will chime in but, if you don't have the two holes in your crossmember I believe the 2 hole crossmember will bolt in in place of yours. Makes running dual exhaust much easier.
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Old Feb 9, 2010 | 10:40 PM
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The '81 stock exhaust the same 2-1-2 configuration as my '80. The stock front cross member did not have holes through it for a true dual system. If your '81 is set up for a true dual exhaust, then you have a pre-'80 cross member.

I have full length headers on my '80 with a true dual exhaust that I explained several times, most recently in this thread with all the necessary pics and instructions:
http://forums.corvetteforum.com/c3-t...n-an-82-a.html.

You will need to make a fairly simple modification to your stock cross member to get the ground clearance on the driver's side.

Yes, you can use an X-pipe or H-pipe. I recommend one of the 2 1/2" universal kits from Summit or Jegs.

Go for it. It's one of the best mods (of many) I made to my '80.
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Old Feb 10, 2010 | 12:18 AM
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Check out these 2.5" universal crossover options at Summit:

X-pipes
H-pipes

In hindsight, I would have used one of these. Check with your exhaust shop to see which he recommends.
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