Whiteline end links are intended to replace the not-so-tough factory links with stronger items. There are several styles. The "standard" links (see inset pic) use a thick steel rod that's bent to shape. The "heavy duty" links (see main pic) move up to billet aluminum that is both lighter and stiffer. Both use firm polyurethane bushings instead of rubber. The adjustable links are threaded so you can adjust the length.
Fits all Subaru WRX with C-shaped plastic end links, 2002-2007.