This isn't really much of a track - just a piece to play around with.
The piece is done using a blender mesh with a curve modifier and a lattice modifier. The lattice just twists the piece in the middle.
I hope the file sharing service works.
I might as well add another one: this one might be frustrating.
I read somwhere that you can avoid the lattice. Selecting your path point in the top of the curve and press 't' to turn it.
I make my maniadrive tests on your track.
The part is funny to drive i confirm.