If you check out walker's website, it notes that this only fits their replacementMuffler (54251), at least for the 2001 Saturn SL1 I was using it for. It slid into the stock hanger bushing perfectly. My only wish is that the clamp bolt was made to be closer to the top of the muffler. Though being on the bottom makes it easier to install, it hangs down a bit and I worry about it catching on something where it is at.