>Can a welded diff be used strictly for hard driving during track use? >Or would I be damaging axles and stuff? Possibly looking to buy another >stock diff and welding the sucker solid(how is this done anyways?) and >swapping it in/out on race days. LSD with 25% lock-up just doesn't seem >that it would offer $400+ worth of performance increase. > >Dan >1990 325i Could be faster... Dan,