Depends on your tire setup as well... My front struts are going out and hitting bump stop on large humps/speedbumps (@>30k miles) after being lowered on TRD springs with stock struts and the 19"TRD wheels... The low pro tires make your strut work twice as hard... Thank goodness I have the 100k mile warranty.Ok Phobic I'm trusting youSo I'll just need the springs and a wheel alignment right?