PLM Seat Base Mount Bracket For Subaru WRX 2015+PLM Private Label Mfg. Seat brackets are stronger than the rest! They are made from high strength carbon steel, laser cut, clean and strong welds. The bracket will not bend or warp with heat whereas other brackets can be bent by hand. PLM Private Label Mfg. seat brackets are more versatile with pre drilled slots for sliders from most major aftermarket seat manufacturers like Sparco, Recaro, OMP, Cobra, F1Spec, Racetech, Status, Corbeau, Bride,