So my cool friend and his nismo frontier is telling me add leafs won't hold up on a heavy load. He said that it will sag. I am currently setting everything up money and purchasing wise for a 3inch pa bd lift tbar cranked and a add leaf from i haven't picked from who yet. So my question is will it sag if pull a 17ft boat, my 4 wheeler, or just hauling whatever I want?

 

Any leaf spring will sag over time, including your OEM spring pack. It won't be overnight however. I don't think you have anything to worry about. Odds are you will be sold your truck before you notice the springs sagging.

 

Thank you wandell!