If you have a 07-13 2nd Gen Tundra this kit will not level. In front it will be 1/2 inch lower. I wish I had known that before buying. Your best bet is to find the best branded company like procomp. You will also need a spring compressor to install them as the screws in the spacer will not match. with factory holes to keep the post from aligning with the bottom bracket. The instructions say to twist the shock to fit it in the mount, which is crazy. To get it right you need to use a spring compressor to twist the coil spring. and the spacer after installation. Lots of work just for the spacer. Other brands don't have this problem. You have been warned!