Dual exhaust conversion
Thread Starter
Racer
Joined: Jun 2005
Posts: 432
Likes: 2
From: Poconos PA
Dual exhaust conversion
theres a guy not far from me that has a mid America dual exhaust (below) off a '77 that I'm thinking of putting on my '79...I'm assuming it should fit...am i correct? And what might i need to know(tips) before attempting this swap......thanks
NCM Grand Opening Veteran
Joined: Sep 2005
Posts: 20,979
Likes: 384
From: South of giving a damn
St. Jude Donor '11, '17
Yes, they will fit, provided your exhaust manifolds are the same as his. They should be, but I would look first. These can be adapted to headers. The only concern you have now is emission testing. '79s came with a cat, so if anyone looks, you will fail. If emmisson checks are not an issue then go for it. Don't pay very much, a new set of pipes from a catalog is only about $300 & a muffler shop will probably build you a custom set for around this price. You will want a heat shield for the pipes that will divert the heat from the floor pan.
Last edited by ratflinger; Apr 1, 2006 at 12:27 PM.
Thread Starter
Racer
Joined: Jun 2005
Posts: 432
Likes: 2
From: Poconos PA
Yes it's the stock manifold....an L82 ........no headers.....hmmm should i get headers too? .....damn everything I touch takes me down the money trail...was going to keep the stock manifold on..emmisions is NP antique plates so no inspection....Thanks for the help guys......... 
Last edited by SULLY_PA; Apr 1, 2006 at 12:19 PM.
Melting Slicks
Joined: Jun 2002
Posts: 2,844
Likes: 99
From: Orrtanna Pa.
I believe your crossmember is designed to allow a single catylitic converter on the passenger side,as my 80 was.(The converter and pipes run under the crossmember) The set up you show looks like for somethng older with the through holes in the crossmember,and would not fit.
Also if you're from Pa.,the visual inspection of factory emmission control devices would fal that exhaust.I had a custom 3" setup made the please the state.It maintained the stock location of the converter(a 3" hp unit) and freed up some breathing due to the pipe size.About a year later the converter plugged and I took a six foot digging iron to it,so now it looks like it used to,but is hollow.
Also if you're from Pa.,the visual inspection of factory emmission control devices would fal that exhaust.I had a custom 3" setup made the please the state.It maintained the stock location of the converter(a 3" hp unit) and freed up some breathing due to the pipe size.About a year later the converter plugged and I took a six foot digging iron to it,so now it looks like it used to,but is hollow.
Last edited by The Money Pit; Apr 1, 2006 at 05:58 PM.
Melting Slicks
Joined: Aug 2003
Posts: 2,135
Likes: 2
From: Dayton Oh
The 79 crossmember was the last year (I think) that was set up for a dual exhaust even though the 79 didn't have a dual. So, you'll not have a problem running a dual exhaust. I'm running MAD's chambered dual exhaust on my 79 but specificially ordered it for my year.
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Thread Starter
Racer
Joined: Jun 2005
Posts: 432
Likes: 2
From: Poconos PA
Thanks all......i have the car registered as an antique so I don't have to have it inspected .......consiquently it's not an issue...i'll check the cross member to see if it has 2 holes ....I think it does......
