I have 3 sets of the Magnum Force spindles, nicest spindle I ever got. The spindle from when I was talking with Ron at the shop is that these are twice the strength of the factory forging if I remember correctly. One set is for my Transformer 70' CUDA that will just be a fun street brawler. Two other sets are for corner carving rods for a future build. I know of at least 2 dozen cars that run these and never heard a complaint or problem and my last car I sold had these on it and handled good since we didn't have to turn down the torsion bar to make it look good.