This is a 2 inch correction and 1 inch differential correction that will keep stock tank. Though the tank fit is tight and will need some work to get a good smooth install. These frames are even lighter than our standard frames and are still 4130 construction. If you are going low for a road race or time attack car this is the kit for you! We will not being offering powder-coat for these as we recommend you do test fits and mods to suit your build grommets, mounts, arrow, etc. We can build this kit in poly mount or com bearing solid mounts, also can combo with extra chassis mount for really high HP cars that do hard launching or clutching. This kit also comes with our t bar and integrated trailing arm mounts with the option of XXXL trailing arms for more stability under load.