These rear lower mounts will adapt your older spec Competition coilovers made prior to 2017 with 2.0 thread pitch for use with Z32 rear knuckles. Or allows you to convert older spec R32 GTS Comp coilovers to GTR spec. Lightweight anodized aluminum. -NOTE: S-chassis Competition and Pro dampers prior to 2017 have different thread pitches where this mount attaches. Please verify your coilover model before purchasing the mounts