1 Here is one of the GTS II seats we picked up from Corbeau. These seats are offered in multiple materials from leather, vinyl and our choice, microsuede. The seats feature high bolstering on the cushion and backrest that will keep us firmly planted in the seats when the car goes side-to-side. Even though these are performance seats, they are not rock hard. They still offer some cushiness so they won’t get uncomfortable on those long hauls to the track.