Question on true duels for 80
Thread Starter
Instructor
Joined: Nov 2005
Posts: 176
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From: Revere Massachusetts
Question on true duels for 80
I have a 80 with true duels. The problem is they hang too low under the frame. Some one told me that the cross member from a older vette with the cut outs for the pipes will bolt up to my 80. If this is true and you know the year that will fit that information will be a great help to me. I plan to replace the complete exhaust system from the headers back. If that cross menber will bolt up I can get the ground clearance that I need.
All help will be appreciated
Joe.
All help will be appreciated
Joe.
Melting Slicks
Joined: Mar 2006
Posts: 3,342
Likes: 7
From: Connecticut
Looks like the 1980 is a different animal than the 79 and older
Look at part A
http://docrebuild.com/dr-r-web/FRAME63.PDF
Look at part A
http://docrebuild.com/dr-r-web/FRAME63.PDF
Le Mans Master
Joined: Oct 2001
Posts: 6,798
Likes: 25
From: Pine Bluff Arkansas
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21
I have a 82 and I assume they're the same.(not positive, tho) I have headers and no Cat. My left side runs over and runs under the pass. seat...right beside the right bank. I have 2 1/2" pipes and there's no problem with ground clearance or anything else. Mine were custom made at a muffler shop, tho. I haven't got a H or Y pipe.
Larry
Larry
Racer
Joined: Mar 2006
Posts: 313
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From: Fairfield PA
Originally Posted by lebvette
I have a 82 and I assume they're the same.(not positive, tho) I have headers and no Cat. My left side runs over and runs under the pass. seat...right beside the right bank. I have 2 1/2" pipes and there's no problem with ground clearance or anything else. Mine were custom made at a muffler shop, tho. I haven't got a H or Y pipe.
Larry
Larry
2" dual exaust installed. I recently installed a 400hp crate engine and what to upgrade to a 2-1/2" dual.
Race Director
Joined: Dec 1999
Posts: 16,945
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the earlier crossmember will not bolt up, the bolts that run up into the frame will but the through bolts on the inside of the frame rails won't, you'll have to cut, bend and reweld the crossmember there to get a proper fit. Why not just take out the stock crossmember, weld a bulge on top where it slopes down (the bulge would have to run up into the bracket for the parking brake guide wheel) and cut a notch in the bottom for clearance? That's what I did on this 82, works like a champ.
Those are 2.75" duals
Those are 2.75" duals
Le Mans Master
Joined: Oct 2001
Posts: 6,798
Likes: 25
From: Pine Bluff Arkansas
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-‘19-'20-'21
Originally Posted by 11Jake
How much did the shop charge? I have an 80 and when I bought it the previous owner had a custom
2" dual exaust installed. I recently installed a 400hp crate engine and what to upgrade to a 2-1/2" dual.
2" dual exaust installed. I recently installed a 400hp crate engine and what to upgrade to a 2-1/2" dual.
Any good shop should be able to do it. The spot under the pass. seat that the single pipe ran....holds the two 2 1/2" pipes now. So it really in a stock location. Good luckLarry
Instructor
Joined: Sep 2005
Posts: 144
Likes: 1
From: Collierville TN
Originally Posted by lebvette
I have a 82 and I assume they're the same.(not positive, tho) I have headers and no Cat. My left side runs over and runs under the pass. seat...right beside the right bank. I have 2 1/2" pipes and there's no problem with ground clearance or anything else. Mine were custom made at a muffler shop, tho. I haven't got a H or Y pipe.
Larry
Larry
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Melting Slicks
Joined: Oct 1999
Posts: 2,581
Likes: 14
From: Tolar Texas
I modified the stock crossmember in my '80 to accommodate both a 700R4 and dual exhaust. Both mods were quick and easy.
Last edited by MIKER; Sep 7, 2006 at 05:49 PM. Reason: I can't spell!
Pro
Joined: Feb 2003
Posts: 582
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From: Ashaway RI
Originally Posted by lebvette
I have a 82 and I assume they're the same.(not positive, tho) I have headers and no Cat. My left side runs over and runs under the pass. seat...right beside the right bank. I have 2 1/2" pipes and there's no problem with ground clearance or anything else. Mine were custom made at a muffler shop, tho. I haven't got a H or Y pipe.
Larry
Larry
I have an 81 with headers, no cat, 2 1/2 pipes, and an H pipe. Left side runs over under the pass side. No ground clearance issues even going over speed bumps. Rossi Custom Exhaust in Warwick, RI did the work for about $450.00. Warwick is not that far from Revere.
Race Director
Joined: Apr 2000
Posts: 17,676
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I had to modify the ends on pre '80 crossmember like TT says when I put my 3 in. system on. Wasn't a big dieal for someone that knows what they are doing. 
