Mercury - Decal Set for 4.6L V8 200-300HP Pro XS Outboards High-Performance Cowling Graphic Kit Factory-Matched Marine Finish 8M0214858. Overview. Every Pro XS owner knows there's a certain excitement in running these engines. They're responsive, athletic and built with the kind of punch you feel the instant you ease the throttle forward. And a big part of that identity comes from the unmistakable Pro XS graphics - those bold red accents and sharp stripes that tell everyone your engine means bus