i ordered 3 inch add a leafs last night and i was wonderin if i have to get longer u bolts to put em on. it didnt say it came with them just teh center pins

More than likely. I had to when I got mine. Remember though, add a leafs are little more than a band-aid. It will work for a while but if you needed them to raise the rear up, you really needed a new leaf pack. I found this out the hard way.