It's 4 bolts on most cars. Some are Torx, but most are 17mm and 14 mm. I have had good luck with powerstop rotors and pads off Amazon, pretty decent quality and good price, used to use only NAPA, sure some will say this and that is better, but the powerstop has served me well on 4 vehicle I own, with many Miles, no warping on the rotors, good stopping with the pads.