Justin, i have measured these many times- the 41.5cm length is exact thru the center of each bushing. the endlink tab is tougher to measure, but i am within 1mm on the measurement.
Tre, i'm pretty sure the measurments given in inches is not too accurate- Subaru would be using metric, and i'm sure that the 41.5cm measurement is more likely than the metric equivalent of 16 1/4" = 41.275
I bought these from a guy who was selling his 05 STi and had bought a ton of parts for it, but never installed them. They were purchased thru the King of Imports, and i called him to ask about the links. he did not have any info, but said he would look into in. i have not heard back from him yet.
these did not come in the original boxes, so no part #.
I also emailed Myles @ Racecomp and he just answered that these are the correct fitment.
Maybe Subaru moves these endlink tabs inboard on the upgraded links for a reason??