The Deaver Raptor springs are 100-percent American-made steel and get rid of the lift block. They're a direct, bolt-in application. Since the OE lift block with integrated bumpstop pad has been eliminated, Teraflex rear JK bumpstop extensions work perfectly to lower the frame-mounted bumpstops exactly the right amount to work with the Deaver springs. We can't say enough about the Deaver springs. The Raptor's rear now matches the front and the ride is butter-smooth and controlled. There's no spring wrap and the truck sits exactly the same height as it did stock.