This is a V2 but the V1 mounts the same way, I believe.  Take your time mounting the pipe.  Make sure you have a rubber isolator at every mount point.  Be certain that the pipe does not touch the frame directly or indirectly through a mount.  It will crack if it sees un-dampened vibration from the engine.  This fact is well documented.  Also, shim your mounts so the pipe is not in a bind at all.  You just want it to "hang" on the frame.  You should not be applying pressure to get something to line up.