Riva stage 1 plus through hull exhaust on 2014 RXTX260

[JuddR]

Need some advise please. Thinking about adding the RIVA stage 1 kit. Has anyone had any mechanical or other issues with having ONLY this kit installed?? Also thinking about adding the through hull exhaust. Does anyone know of a kit that will exhaust above the waterline? Thanks in advance for any help.