Why bother asking questions if you're just going to ignore the answer? There is no (as in ZERO) physical-fit difference between 1034 and 1157. They are built to the same physical specifications. If you find an 1157 that won't fit in a socket that originally held a 1034, either the socket or the 1157 bulb is faulty (or you've got the bulb 180° off of its correct position; these dual-filament bulbs only fit the socket one way round).