O.E. Exhaust Question

[Kurt Arends]

I am wanting to replace the entire exhaust system on my '75 S&S. I want to end up with it sounding as it did on the day it left Cincinnatti and 100% factory quiet. What have others, who have had similar interest in keeping their cars quiet, used in the past for mufflers and resonators. I don't want any disappointments when it is done.

 

[John Royark JR]

There are many brands that will give you the same effect. I would just recommond taking it to a reputable exhaust shop and tell them you want it wisper quiet, they should have no problem doing it.
Be sure the manifolds are good, these are notorious for cracking. Also, I would recomend getting copper gaskets, they are much better than standard exhaust gaskets.

 

[Kurt Arends]

One of the things that amazed me most about this car when I bought it was the fact that it had NONE of the typical Cadillac exhaust manifold noise. I had previously thought that exhaust manifold leaks, cracks, and gasket issues were a standard feature on any Cadillac with a 472 or 500 cubic inch engine!

 

[Mike Stevens]

exhaust noise

Kurt,
I agree with John. Any reputable muffler shop should be able to make your
car whisper quiet again. I would suggest to get the name brand muffler if you have a choice between that and a 'house' brand. We just got my 61 back to Cadillac quiet. I was being kept busy replacing exhaust gaskets. They kept burning out within a year. When we had the engine out we found the right manifold was cracked. Even 390s suffer from cracked manifolds over time. We had the old manifold welded. It cracked again in a new place. The second welding job fixed the second crack. Then it cracked again, in a 3rd spot. At that point we decided the manifold was shot. A set of new manifolds and a new Y pipe solved all my noise problems. My luck in finding manifolds was that a member had a set aging on his garage shelf.
Mike

 

[Michael Mykulak]

Kurt, I got a Superior parts book with our coach. The same one that surfaces on Ebay often. In the catalog are diagrams of exhaust systems with part numbers, on what pipes belonged on our 1969 so there was no doubt about what the components should be in the exhaust system. Went to the local muffler shop and the only effort in locating all the parts was the resonator at the time. There was only one in state when I got the one. So lifetime mufflers you pay the highest prices for of course and 3-4-5 year warranty items you are lucky if they last the whole warranty period. Joe Rackov would likely know about exhaust systems working in the dealership. USAPARTSSUPPLY.COM if I remember has several exhaust system parts diagrams that may show your system. Again if I remember correctly the systems are the same for a standard Fleetwood except for one pipe is much longer. Our muffler shop does stainless steel exhaust also. We had the chrome exhaust tip welded on our system. I think it's a nice finish detail and it should last the life of the resonator hopefully.

 

[Shawn Blyler]

I got all of the exhaust components for my 1968 Fleetwood 75, including muffler and resonator at www.classicexhaustinc.com I got the aluminized pipe and it is very heavy gauge. I then took it to the exhaust place where they put it on and then welded all the seams. Everything fit very well and was correct. Sounds pretty quiet to me.

 

[Russ Austin]

Just ask for a stock muffler, and please add a resonator. The resonator is going to take the lub lub lub sound out of the exhaust.

 

[John Royark JR]

One of the things that amazed me most about this car when I bought it was the fact that it had NONE of the typical Cadillac exhaust manifold noise. I had previously thought that exhaust manifold leaks, cracks, and gasket issues were a standard feature on any Cadillac with a 472 or 500 cubic inch engine!

I know when I drove this car it was wisper quiet, but that was around 2005. Im happy to know the manifolds are still leak free, as sometimes taking them off to fix is alot of hassle, especally if you break a bolt in the head.