They're on the cheaper end in terms of materials and weight, but that's not to say they're a bad seat. They're just not Cobra, Sparco, Recaro, or OMP, etc...
800F/250R springs, Torsen
Caster/Camber Plates, Forgestar
18x11 F14's w/ 315/30/18 Hoosier
A6's, front and rear....and a whole lot of other stuff.