i would double nut it but it allready hits my cat when i turn etc i would cut but im letting it clearence itself out lol it is technacly illegal in ca to mod a cat haha so im letting the shackle do work. i orginally tightned them with my electric impact gun and then snugged them with a crescent and socket. but i had 300 miles on them/ i figure good rule of thumb is tighten all suspension bolts every 100-150 mi plus add a quart of oil every long trip hhaha hasnet failed yet