It was tight but it fit perfectly. Only issue is upgrading the pipes that fit on to it are hard only because it’s aluminum instead of plastic like the original. But once I got some Gly-slide silicone it was a lot easier. Second time I’ve bought from this company I had one for my n54 which fit except one of the mounting brackets holes was mismatched but was able to drill new one. But the one for my N55 went right in. Tight but perfect fit