Low Range Off-Road Chevy Spring Swap Kits allow you to install Chevy 63" Long Leaf Springs on to your Toyota ride. 63" Chevy springs give your vehicle added flex and a softer ride. Making your toyota ride like a dream on and off road. The difference between Chevy's springs and the stock Toyota's is unbelievable, you will need this kit to install them because the Chevy spring is 2.5" wide compared to the approximate 2.25" width of the Toyota leaf.