Racing Seat HELP??

I bought these earlier today

Hyperformance -- SALE ENDS TODAY ! - HYPER-3A LEATHERETTE racing seats - 252928 ALL GREY Vinyl ($376/PAIR - SLIDERS INCLUDED)

Universal sliders are included.......



EDIT*** ok I get it now, the sliders are universal so they mount to any stock brackets, so i understand now what I was asking before...........

HOW MUCH TROUBLE IS IT TO GET STOCK SEAT BRACKETS OFF??????????/

if the sliders are universal why would i have to order brackets since they claim the sliders mount to 95 percent of all vehicles stock mounting brackets?????