DJM makes a 1 inch lift shackle, I actually used it on my flip kit to get the extra inch down since I have the rear hanger inverted. I love my nitro drop 2s in the rear, huge improvement over my stock ranchos. im currently on #8504 for 2-4" lowering, need to swap them out for the #8510 which are for 5-7" lowering. I did not like the shock extender method, looked horrible and really didn't like how low the mounts were in relation to the rest of the truck