Hi man,
I think this instrumental can definitely be used for a rap song. The only thing I would change is the beginning of the track. I think you should use an high pass filter instead of a low pass filter, because now the beginning sounds like the track is kinda bad produced, while it's actually pretty good.
Maybe you can find a rapper that likes this track and wants to work with your beat on Twine.
Good job and keep on working!
Iuvenis