exhaust pipe routing
Thread Starter
Safety Car
Joined: May 2005
Posts: 4,176
Likes: 7
From: Jennings LA
exhaust pipe routing
I am installing headers and true duals on an 81 without convertors does anyone have pics of there exhaust routing, also do I need a crossover pipe to conect the two sides?
Burning Brakes
Joined: Apr 2000
Posts: 1,076
Likes: 0
From: Dixie TN
H or X pipes
Originally Posted by gator79
I am installing headers and true duals on an 81 without convertors does anyone have pics of there exhaust routing, also do I need a crossover pipe to conect the two sides?
these will help your exhuast. 
Last edited by A78Corvette; May 28, 2005 at 11:58 PM. Reason: misspelling
Thread Starter
Safety Car
Joined: May 2005
Posts: 4,176
Likes: 7
From: Jennings LA
ok if no one has pictures can you tell me how they were run? are they run side by side on the passengers side? do you modify the crossmember? it looks pretty tight under there for 2 sets of pipes. help, my headers are ordered, I have a shop that can custom bend the pipes, thanks
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by gator79
anyone???
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Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by gator79
thanks bobs77vet, crossmember from BTO who is that?
Pro
Joined: Aug 2002
Posts: 560
Likes: 0
From: The Valley of The Sun AZ
That looks nice Bob but that's not going to work for him since he still has the TH350C in there. You need to route it down off the manifolds, and do like a 70 degree bend over to the passenger side then back past the tranny, then some more swooping bends right before the mufflers to be stock. I don't think I have any pictures of the whole thing. My neighbor with his 79 just ran duals straight out the back after the cats, no muffler and the thing is still too quiet for me. I am going to let a custom exhaust shop figure out my new setup because I am going to use electric dumps and and X pipe and it will need to be really planned out. The funny part is, I am going to have to drive the car to them with open headers to get the work done, that should be loud.
I would search the forums, I have seen pictures of 81 true dual setups in here before.
I would search the forums, I have seen pictures of 81 true dual setups in here before.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
You first need to either buy or modify your cross member.
Transmisions last longer without lots of heat. The cross member on my 79 came with dual holes in the cross member but they are way to close to the tranny. Especially if you have a big pan like the 700R4 on Bobs77Vette.
Anyway my modified cross member allows the pipes to come straight back from the headers. They go back straight with only a slight bend in each to bring them close together under the pumpkin. Where they bend back out to two three inch in and out race stainless packed mufflers in the near stock location.
Transmisions last longer without lots of heat. The cross member on my 79 came with dual holes in the cross member but they are way to close to the tranny. Especially if you have a big pan like the 700R4 on Bobs77Vette.
Anyway my modified cross member allows the pipes to come straight back from the headers. They go back straight with only a slight bend in each to bring them close together under the pumpkin. Where they bend back out to two three inch in and out race stainless packed mufflers in the near stock location.
Drifting
Joined: Feb 2002
Posts: 1,987
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From: Manchester, Dead Center in the Middle of TN 25 miles to Jack Daniels,10 miles to Geo Dickle, and .8 mile from the Liquor Store at I-24 Exit 114
St. Jude Donor '05
Those do look good Motorhead but why not put an X-pipe where the two pipes turn in close together instead of the H-pipe? jim
