sorry abt the wait, yes they are r1 racing seats, i bought them on ebay for like 450 or somthing like that.... they do come with universal sliders but they are too short and narrow to just bolt on directly. i had to have custom brackets made . all i did was cut the risers off my old seats, bolt and wels 2" steel between them. it was a b****. but they are in now and they in and are confortable. any more questions???? here is a pic of the ext of my car. ground effects will be here on the 25th and i will have rims this week.