Summit headers?
I have the summit headers (non coated).
and they seem to be nice headers.
but I want to say (not positive here) that they are basically the same thing as a set of headmans ....so if your looking to change them out because you don't like the design of your current ones or something than you may find that your getting into about the same thing.
biggest thing that drew me towards buying them was the price! they were priced very reasonable and I do not see the sense in spending a grand on a set of headers (personally) ....so I went summit brand.
they don't appear to hang that low at all like I have seen alot of other complain about....I don't think I will worry about denting them in unless I hit a speed bump going to fast.
the quality of the headers isnt "perfect" but for what I paid....its not bad.
by not perfect I mean.....there was some weld spatter around the flanges and what not...most high end companies would take the extra time to "clean up" the product a bit more prior to shipping them out (they may make the coated headers with a cleaner finish being that they go through additional processing though!).
they were not a "perfect" fit in my 72 duster....but then again each car will be SLIGHTLY different from the other depending on position of the motor mounts and if they are worn out and size of torsion bars and if that car has ever been in a bender before and got tweaks and so on and so forth.
I had to hammer in a couple of my tubes just a smidge to get enough clearance to clear my front sub frame to where I felt comfortable enough that I wouldnt be smacking the headers against it when I reved the engine or have them rattling against each other.....and it went smoothly and worked great ....but like I said, each set of headers and each car might be slightly different so you may have more troubles or no troubles...who knows.
I am sure alot of people will say to go with the better brands that you mentioned NOT to mention.....and sure...they are better and may last a bit longer. But I think for being on a budget that summits are just fine.
I have yet to put miles on the duster so I cant say how well they hold up or if there are any problems with bottoming out but it LOOKS like (atleast on mine) that I have PLENTY of clearance .
hope that helps a bit