[tcromwell35]

Hello All...Well, as I slowly chip away at things on my 73 Cougar convertible, I'm looking now at the exhaust manifolds. There is nothing wrong with the ones that are on now - they are the stock exhaust manifolds that came with the 351C 2V. But I am trying to do two things ultimately - increase horsepower (although this is still to me just a mildly modified engine), and decrease under hood temperatures if possible. I called Hooker, and they said they didn't have anything anymore for my vehicle. My question is should I consider having the existing headers coated, such as Jet Hot coatings, or is there another option out there which would fit without me having to modify anything. As always I appreciate the input! Thanks, Tyson

 

[cj750]

It won't add any horsepower, but appearance wise, Eastwood manifold paint works quite well.
http://www.mustangmonthly.com/howto/mump_0911_how_to_restore_exhaust_manifold/viewall.html

As an alternative, shorty headers are available. I question whether there's enough performance benefit to justify the trouble and expense. I have no personal experience with them though.
http://stang-aholics.com/ShowItem/108383 69 - 73 Mustang 351 Cleveland Shorty Headers.aspx

 

[Shadowofkoga]

do you still have the exhaust manifolds? Do you want to sell them.? Or atleast the right side one.