I bought the NRG narrow seats (303BK) (they are tight - hope the foam breaks in a bit) and the mounting plates from Extreme. Had to modify the mounting plates to get them to work. They fit in the car, but I cannot imagine getting anything wider to fit. Passenger side is impossible to install. I ended up cutting a small access panel behind the passenger seat so I can stick my hand in and get the back two seat bolts. I ended up covering the access panel with a piece of black kydex plastic that I bought on ebay.