Extrude along arch

[SCALEMODEL]

Are you looking for sweep along a path?

Something like this.

Create faces, to get 3D intersection spline

I want to create a 3D spline, to design a 3D pipe (exhaust) May we create face or surface, and intersect them? See drawing attached. Sorry for the strange language [Admission turbo Kawasaki Z1400 turbo]