[Terry5357]

I notice that the flanges look like they are made for some kind of adapter. I have never seen anything like that. Can anyone give me some idea. Also I know they are not SS, I ma looking just to get the headers now and will get quality headers later

[stlwagon]

Which ones?? Do you have a link?

[Terry5357]

MAC 1 75 Long Tube Race Headers 2005 Mustang GT at v8power.com

or these

Hooker Headers, Gray Finish, 2005-07 Mustang GT - 6233HKR

or these
Modern Speed Machines : Stainless Works Mustang GT 1 5/8" Headers only [M05HB] - $697.25

[Terry5357]

One more question.
on my previous cars that I put headers, I simply cut the exhaust pipe welded flanges onto the exhaust wywtem and was good to go.
I realize there are some O2 sensors that have to be dealt with but other than that can I do the same thing only have flanges welded to cats and then cats welded to the exhaust system?

[stlwagon]

Originally Posted by Terry5357

One more question.
on my previous cars that I put headers, I simply cut the exhaust pipe welded flanges onto the exhaust wywtem and was good to go.
I realize there are some O2 sensors that have to be dealt with but other than that can I do the same thing only have flanges welded to cats and then cats welded to the exhaust system?

You should buy a complete setup with headers and matching H or X pipe. There would be no cutting/welding required and all the O2 sensor bungs are provided.

[Terry5357]

Originally Posted by stlwagon

You should buy a complete setup with headers and matching H or X pipe. There would be no cutting/welding required and all the O2 sensor bungs are provided.

Well I better keep saving, X-pipes with cats are almost as much as headers...............oh well

[stlwagon]

Originally Posted by Terry5357

Well I better keep saving, X-pipes with cats are almost as much as headers...............oh well

You could fabricate your existing H to fit a set of headers, but it would take some work and $$.