Most likely not. This is like asking if I put a bigger engine in my car will it go faster. Sure it will if you are on a private track without the police following you, on the main highway it will still only go the speed limit.
The ISP is always the bottleneck. You can test by directly plugging into the router and see if there is any difference between wired speed and wireless.
5G itself goes exactly as fast as 2.4g when running N with mimo and wide channels. The key here is more to force your router to ONLY support N mode. If you run G/N mixed mode it will run slower. Some people think 5G runs faster but that could be because 5G does not support mixed mode.