Purple Headers

i have searched these things all over for numbers or markings with no luck. wouldnt a set of flowtechs have the first tube on drivers side come straight down for center link to go thru? i may be wrong though. i thought they may be dougs. i forgot to mention they have 1.75 tubes, and are coated inside also. they look like they might fit my dart . but if they dont thats alot of work for nothing.