Sold as a paid of upper and lower link mounts
100% 4130  and TIG welded to the highest standards. 
3-1/16" Lower spread with 3/4" bolt hole
2-5/8" upper link mount spread with  (2) 5/8 bolt holes for adjustable anti squat. 
Geomerty is easy to set, uppers locate off the lowers to make things easy for install!