I had terrible luck with my OME leaf springs. At first, they gave me barely any lift (was going for 4" with a 2.5" pack and 1.5" shackle). After I talked to ARB/OME they sent me the extra leaf (2nd to the top) and that helped. I still had to make them into a bastard pack to get them to sit at the desired height. I did, however, have a lot of weight with a rear bumper, tools and spare. This past fall I pulled out the main leaf on both sides as the front eyes were deformed so they wouldn't hold the bushings tight.