64-66 exhaust system on 68 coupe
- Thread starter bad68coupe
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What exactly do you have in mind? Brand of kit, etc. There are kits out there for 67-68's, but I'm sure you know that
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fasttback
New Member
We do need a little more info. Are you interested in going through instead of under the rear valance?
exhaust
I don't know why you would want a 67-68 exhaust on a 65-66. I have a '68 Cougar and I had a custom exhaust made for mine last month for $300 with flowmasters. But as for an answer to your question, The rear brake line hooks up differently between the 65-66 and 67-68. On the 65-66 the rear brake bracket has to be moved if you are considering dual exhaust. That is if it is still in the stock position.
I don't know why you would want a 67-68 exhaust on a 65-66. I have a '68 Cougar and I had a custom exhaust made for mine last month for $300 with flowmasters. But as for an answer to your question, The rear brake line hooks up differently between the 65-66 and 67-68. On the 65-66 the rear brake bracket has to be moved if you are considering dual exhaust. That is if it is still in the stock position.
What exactly do you have in mind? Brand of kit, etc. There are kits out there for 67-68's, but I'm sure you know that
well i am between the flowmaster 64-66 kit and the magnaflow 67-68 kit. the flowmaster kit is about $150 cheaper. I am planning on going under the valence
bad....
Go with the Maggies. I am a dealer for both magnaflow and flowmaster so I see these kits all the time....the maggies are 10times better quality and last FOREVER.
Go with the Maggies. I am a dealer for both magnaflow and flowmaster so I see these kits all the time....the maggies are 10times better quality and last FOREVER.
how does the magnaflow sound compare to the flowmaster?
and would it be possible to adapt the flowmaster to fit?
and would it be possible to adapt the flowmaster to fit?
that is what i don't understand, what is it that makes it better quality, its the same material is it not (except for the mufflers)?
I am in a serous crunch for money, and the flowmaster is the more cost efficient option.
also is the magnaflow system for short or long-tube headers?
302 coupe
Founding Member
you'll have to adapt either kit to fit your headers. It may not matter in Texas on a non catalytic converter equipped car, but magnaflow is all stainless steel, whereas flowmaster is aluminized steel. The aluminized would last a long time, but the stainless will last bascially forever. IMO, it comes down to sound preference. I've used both, currently using magnaflows and like them.
I plan on adding cut-outs down the road, does that affect ya'll opinons of which kit i should use?
65ShelbyClone
Founding Member
It matters on any car, cat converter or not. The key is driving long enough for the exhaust to get hot and boil the water away. Short trips kill exhaust systems because the water pools up in the mufflers, mixes with acidic combustion byproducts, and rots out. I've been working out a lot of bugs in my '68 and not driving very far. I pulled one side of the exhaust to work on the trans and saw rust specks in the headers while water trickled out of the glasspack. I would say 10-15 miles minimum of steady driving is enough to dry it out.
Now that the science lesson is over, I will say that stainless or aluminized will be fine. Aluminized will last a long time if it gets hot enough to dry out and will save a lot of money. Stainless will take anything you can throw at it, but you'll have to throw more money at it.
If you get stainless, I would recommend having stainless cut-outs fabricated by a shop. All they need is are the flanges, a hole saw, a tubing notcher, and about 12-14" of straight stainless tube. The FlowTech "Race Readies" are mild steel and would look terrible patched into a stainless system
302 coupe
Founding Member
your headers were rusty because they are bare steel on the inside. I stand by my statement earlier.
i had a flowmaster catback system on my 'driver (94 explorer) and ill never give them another dime of my money! the system was just barely 3 years old, and it rotted completely off! tailpipe rusted completely in two pieces, muffler dragging the pavement, the whole ugly scene. flowmaster did offer to replace the tail pipe for a reduced price of 87.00...
what acidic combustion byproducts are you talking about? When a hydrocarbon, such as gasolin, is burned all that it yields is water (h2o) and Carbon Monoxide (CO)
65ShelbyClone
Founding Member
The ideally complete combustion only yields CO2 and H2O. Carbon monoxide is a byproduct of incomplete combustion, and no gas engine ever reaches perfect combustion.
Carbon dioxide, present nomatter how complete the combustion, mixes with water forms carbonic acid. Small amounts of sulphur present in gasoline get burned and become sulphur dioxide, which mixes with the water to make dilute sulphuric acid. Nitrogen oxides from high combustion heat also combine with water to make nitric acid.
Carbon dioxide, present nomatter how complete the combustion, mixes with water forms carbonic acid. Small amounts of sulphur present in gasoline get burned and become sulphur dioxide, which mixes with the water to make dilute sulphuric acid. Nitrogen oxides from high combustion heat also combine with water to make nitric acid.
Iamdiffrnt
Member
Also if you are having a stainless system installed, make sure that any welds are done with stainless also.
It can be really irritating spending all that money on a stainless system and have a weld fail because it rusted out.
It can be really irritating spending all that money on a stainless system and have a weld fail because it rusted out.
65ShelbyClone
Founding Member
Sure thing. There is so much chemistry going on in your exhaust system alone that it boggles the mind. 
You ought to see white papers on gasoline!
You ought to see white papers on gasoline!
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