i actually got them off of ebay.. for like 186 with tax for the set of 4.. my friend who went to itt tech installed them for me.. his dad said they were a really good brand that they make a lot of good parts for airplanes since he is a engineer.. the brand is ztec... mine or the 8k.. i actually bought some for my mustang gt.. like 3 years back and i still have the same ones i havent replaced those and i just got there maybe like 4 months ago.. hope that helps a little