@Martin_R
I think the cans are symmetrical yes.. at least by the look
But there is a small hook for a spring on the inner side of the pipe where it gets connected to the half pipe.
I didn't have to use it with the standard half pipe though, I belive it is there for the after market half pipe.
There are also two inserts which are used between standard half pipe and both exhausts, to get a smaller standard pipe diameter to fit the bigger one on the can.
There isn't mentioned anywhere that an Arrow aftermarket half pipe can be used with this cans, but I think it just might work.
@Torino
I hope they soon become available - 'legal' at your market too
regards,
D.