425 Motorsport's Planted Offset Steel Side mount bracket is constructed from 1/8 inch thick steel, complying with the FIA's required side-mount thickness. The universal design fits competition, side-mounting seats from Sparco, Recaro, Racetech, OMP Cobra, Status, Bride, and probably many more! Meant for installation to aftermarket sliders, these side-mounts also offer multiple slots for direct mounting to the car.