Yes, and of course the HP manifolds got the duals, that is a given. It's the low po engines that are curious, like a T code 440
Fusie Factory Dual Exhaust Question /// Help!!!!!
- Thread starter DeMopuar
- Start date
You are correct, in your Polara example the ** would indicate the body type, the "T" would be the standard 440 engine it came equipped with in either year, (it would be a "U" code for either year if equipped with the HP 440 with dual exhausts) and the 0 or the 3 would indicate the model year of the car. My assumption was that someone would know the year and body style of their car. In the interest of being more specific, the first code on the lower line of the data plate on the '69- '73 cars or the 5th digit on the '70- '73 cars will tell you if the car was equipped an HP engine with factory dual exhaust or not.
69CoronetRT
Senior Member
Every one I've ever seen, was
65MonacoND
Active Member
He actually discussed that with me. After I placed my order I was called and asked about what muffler style I had. He said some used a longer muffler. He also said that sometimes due to variances like that he left the pipes a little long so that there were no issues on the longer cars. Better to trim than have to add.
commando1
Old Man with a Hat
Interesting. Been bugging me for years. Thanks. I can get some sleep now.
Interesting that the engine image shows an air cleaner that Mopar never built, to my knowledge with the rectangular inlets. In 1970 the air cleaner bases included the baseplate and sides and the top alone was screwed on with the usual wing nut.
I think given all the variations over the years, each year's model offerings were likely a fight between the product planners and the bean counters. If there was ever a healthy opportunity for cost reduction, it was in eliminating a dual exhaust system whenever possible. As was witnessed especially after 1972 when emission controls made the engines anemic with any exhaust layout.
69CoronetRT
Senior Member
Nick at Nick's garage has a nice compilation of air cleaner units sorted by year: http://www.nicksgarage.com/aircleaner.htm
Much of Mopar literature has incorrectness in it which suggests it was written or drawn before production.....
Yes, often the renderings of the cars in the brochures had no antennas on them.
This post has had me thinking and in my research I discovered some information I wasn't aware of. The same rule of thumb still applies about the exhaust manifolds but it is interesting that the standard "T" code 350 hp was the only 440 offered on many models and was only available with dual exhausts and dual snorkel air cleaner. So when you say that "Every one that I've seen was" you are correct when it comes to certain years and models. I have compiled a list of what I have found going through parts books, service manuals, brochures, pictures etc.... I knew about the Chrysler's, the wagons and the 70 Fury GT but much of it I was unaware of.
1969
The 350 hp “K” code engine was only available in the Chrysler line with a single exhaust with the exception of the Town & Country.
This same “K” code engine was available as an option in the Monaco and Polara and Town & Country’s but it came equipped with dual exhaust in those models.
The 375 hp “L” code engine was an available option in all Monaco’s, Polara’s, Fury’s and Chrysler Models with the exception of wagons.
1970
All Chrysler models with the standard 350 hp “T” code engine came with single exhaust with the exception of Town & Country, that would come equipped with dual exhaust. All Chrysler models, with the exception of the Town & Country were available with the 375 hp "U" code engines.
No Fury's or Polara’s, were available with the 375 hp "U" code engines.
Fury’s and Polara’s with the optional “T” code engine were equipped with dual exhaust.
1971
All Chrysler models with the standard 335 hp “T” code engine came with single exhaust.
The Polara and Monaco models with the optional 335 hp “T” code engine came with single exhaust.
All Chrysler models with the exception of the Town & Country were available with the 370 hp "U" code engines.
All Fury models were available with the optional 335 hp “T” code engine with dual exhaust.
The Sport Fury GT is the only model that came with the 370 hp U code engine.
1972-1973
All general public Chrysler, Polara, Monaco and Fury models came equipped with single exhaust.
All general public
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First, thank you for the leg work...
I have a T code 71 with factory dual exhaust,. So it was at the least, optional. I will add that any 71 polara with a 440 I have seen had dual exhaust. I've been looking for 35 years and have seen few 440 cars, but they had duals. Perhaps Steve or Carsten will chime in on that...
2nd... You sound like Jeff Godshall, please don't say the U code wasn't available in the 70/ 71 polara. They are out there be it under the hood of a police car or civilian car, some got out
bluefury361
Old Man with a Hat
Of course Will, if there is a high then there must be a low..
MrMoparCHP
Old Man with a Hat
Here is how the dual exhaust was run on my 69 CHP Polara, they are exact reproductions of the factory pipes.
As you can see on the driver side the tank has an angle to it as well as the flange being bent up for the pipe to have clearance to get through.
Alan
As you can see on the driver side the tank has an angle to it as well as the flange being bent up for the pipe to have clearance to get through.
Alan
69CoronetRT
Senior Member
Dave, I don't know that I've ever seen "optional exhaust". That's one of those deals that one would need to provide documentation that shows something out of the norm did in fact exist. For example, a broadcast sheet showing the PNs of the exhaust pipes installed would be helpful. It may have been a limited application but having documents to back it up would be good.
#2--Yep. '71 U code Polaras are out there.
Thank You Doug..... I would swear that all 440 1970 and 1971 Furys, Polaras and Monacos had dual exhaust. I made this argument many moons ago on this board. I was told it was optional by many....... so to keep the peace here I wrote the "at least optional" ..... Sometimes I just dont have it in me and I move on, I dont like my face blue
69CoronetRT
Senior Member
Here's something of interest. It's from the 71 Fleet book.
I know there are mistakes in the book but there is a '71 Polara/Monaco 440 dual exhaust application listed in the 70/71 parts book. Were dual exhausts limited to only police cars? Research continues.
This topics shows why is why it is SO important that any documentation be saved from cars that are parted. Fender tags, window stickers and broadcast sheets help answer questions just like this. Once the documentation is gone...it's gone forever.
commando1
Old Man with a Hat
What does "E" stand for. Extra cost?
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