Avoid SS leaf springs if not a drag car, as the SS leafs are not equal construction left and right and therefore not symmetrical. Additionally, avoid Mancini leaf springs as one of the two SS leaf springs I bought from them the main leaf arched the wrong way the last 4 inches. When I raised this concern to Mancini they said “We have sold hundreds of these and you are the only one with this complaint so it’s not a defect, therefore if you want to return them you pay return shipping.” I opted not to spend $100 in shipping to get $220 refund. Not long after that another member had a problem with Mancini SS springs during install due to that bad main leaf in one of the spring packs bending the wrong way the last 4 inches. So I shipped him the good one of my SS set and he was good to go using matched good leaf springs, basically a 340 HD spring set at that point. In other words, call ESPO for good leaf springs you buy once and Mancini if you want to waste money on junk.